feat(expenses): add transactional expense case events
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caoxiaozhu
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"""add expense case and transactional business event tables
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This is the first migration-owned schema slice in a legacy database that still
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bootstraps older tables through SQLAlchemy metadata. The server startup runs
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this revision before the legacy bootstrap, and the legacy bootstrap explicitly
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excludes these migration-owned tables.
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Revision ID: 20260713_0001
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Revises:
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Create Date: 2026-07-13 11:45:00
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"""
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from collections.abc import Sequence
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import sqlalchemy as sa
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from alembic import op
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revision: str = "20260713_0001"
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down_revision: str | None = None
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branch_labels: str | Sequence[str] | None = None
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depends_on: str | Sequence[str] | None = None
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def upgrade() -> None:
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op.create_table(
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"expense_cases",
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sa.Column("id", sa.String(length=36), nullable=False),
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sa.Column("tenant_id", sa.String(length=64), nullable=False),
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sa.Column("case_no", sa.String(length=80), nullable=False),
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sa.Column("scene_code", sa.String(length=50), nullable=False),
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sa.Column("title", sa.String(length=200), nullable=False),
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sa.Column("owner_employee_id", sa.String(length=36), nullable=True),
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sa.Column("current_stage", sa.String(length=40), nullable=False),
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sa.Column("status", sa.String(length=30), nullable=False),
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sa.Column(
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"created_at",
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sa.DateTime(timezone=True),
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server_default=sa.func.now(),
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nullable=False,
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),
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sa.Column(
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"updated_at",
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sa.DateTime(timezone=True),
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server_default=sa.func.now(),
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nullable=False,
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),
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sa.PrimaryKeyConstraint("id"),
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sa.UniqueConstraint("tenant_id", "case_no", name="uq_expense_cases_tenant_case_no"),
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)
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op.create_index("ix_expense_cases_tenant_id", "expense_cases", ["tenant_id"])
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op.create_index("ix_expense_cases_owner_employee_id", "expense_cases", ["owner_employee_id"])
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op.create_index(
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"ix_expense_cases_tenant_stage",
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"expense_cases",
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["tenant_id", "current_stage"],
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)
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op.create_index(
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"ix_expense_cases_tenant_status",
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"expense_cases",
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["tenant_id", "status"],
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)
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op.create_table(
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"expense_case_links",
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sa.Column("id", sa.String(length=36), nullable=False),
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sa.Column("tenant_id", sa.String(length=64), nullable=False),
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sa.Column("expense_case_id", sa.String(length=36), nullable=False),
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sa.Column("resource_type", sa.String(length=50), nullable=False),
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sa.Column("resource_id", sa.String(length=100), nullable=False),
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sa.Column("relation_type", sa.String(length=50), nullable=False),
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sa.Column(
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"created_at",
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sa.DateTime(timezone=True),
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server_default=sa.func.now(),
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nullable=False,
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),
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sa.ForeignKeyConstraint(["expense_case_id"], ["expense_cases.id"], ondelete="CASCADE"),
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sa.PrimaryKeyConstraint("id"),
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sa.UniqueConstraint("resource_type", "resource_id", name="uq_expense_case_links_resource"),
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)
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op.create_index("ix_expense_case_links_tenant_id", "expense_case_links", ["tenant_id"])
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op.create_index(
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"ix_expense_case_links_tenant_case",
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"expense_case_links",
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["tenant_id", "expense_case_id"],
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)
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op.create_table(
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"business_events",
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sa.Column("id", sa.String(length=36), nullable=False),
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sa.Column("tenant_id", sa.String(length=64), nullable=False),
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sa.Column("expense_case_id", sa.String(length=36), nullable=False),
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sa.Column("aggregate_type", sa.String(length=50), nullable=False),
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sa.Column("aggregate_id", sa.String(length=100), nullable=False),
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sa.Column("event_type", sa.String(length=80), nullable=False),
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sa.Column("event_version", sa.Integer(), nullable=False),
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sa.Column("idempotency_key", sa.String(length=120), nullable=False),
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sa.Column("correlation_id", sa.String(length=64), nullable=False),
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sa.Column("causation_id", sa.String(length=64), nullable=True),
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sa.Column("actor_id", sa.String(length=120), nullable=False),
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sa.Column("actor_type", sa.String(length=30), nullable=False),
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sa.Column("payload_json", sa.JSON(), nullable=False),
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sa.Column("delivery_status", sa.String(length=20), nullable=False),
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sa.Column("delivery_attempts", sa.Integer(), nullable=False),
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sa.Column("last_delivery_error", sa.Text(), nullable=True),
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sa.Column(
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"occurred_at",
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sa.DateTime(timezone=True),
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server_default=sa.func.now(),
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nullable=False,
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),
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sa.Column("published_at", sa.DateTime(timezone=True), nullable=True),
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sa.ForeignKeyConstraint(["expense_case_id"], ["expense_cases.id"], ondelete="CASCADE"),
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sa.PrimaryKeyConstraint("id"),
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sa.UniqueConstraint(
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"tenant_id",
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"aggregate_type",
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"aggregate_id",
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"event_type",
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"idempotency_key",
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name="uq_business_event_idempotency",
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),
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)
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op.create_index("ix_business_events_tenant_id", "business_events", ["tenant_id"])
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op.create_index("ix_business_events_event_type", "business_events", ["event_type"])
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op.create_index("ix_business_events_correlation_id", "business_events", ["correlation_id"])
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op.create_index(
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"ix_business_events_tenant_case_time",
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"business_events",
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["tenant_id", "expense_case_id", "occurred_at"],
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)
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op.create_index(
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"ix_business_events_outbox",
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"business_events",
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["delivery_status", "occurred_at"],
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)
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op.create_index(
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"ix_business_events_aggregate",
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"business_events",
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["aggregate_type", "aggregate_id"],
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)
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def downgrade() -> None:
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op.drop_index("ix_business_events_aggregate", table_name="business_events")
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op.drop_index("ix_business_events_outbox", table_name="business_events")
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op.drop_index("ix_business_events_tenant_case_time", table_name="business_events")
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op.drop_index("ix_business_events_correlation_id", table_name="business_events")
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op.drop_index("ix_business_events_event_type", table_name="business_events")
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op.drop_index("ix_business_events_tenant_id", table_name="business_events")
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op.drop_table("business_events")
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op.drop_index("ix_expense_case_links_tenant_case", table_name="expense_case_links")
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op.drop_index("ix_expense_case_links_tenant_id", table_name="expense_case_links")
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op.drop_table("expense_case_links")
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op.drop_index("ix_expense_cases_tenant_status", table_name="expense_cases")
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op.drop_index("ix_expense_cases_tenant_stage", table_name="expense_cases")
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op.drop_index("ix_expense_cases_owner_employee_id", table_name="expense_cases")
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op.drop_index("ix_expense_cases_tenant_id", table_name="expense_cases")
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op.drop_table("expense_cases")
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