feat(ai): issue verified application preview decisions

server/tests/test_alembic_migrations.py

@@ -19,7 +19,7 @@ from app.db.schema_ownership import MIGRATION_OWNED_TABLES, create_legacy_schema
 
 MIGRATION_TEST_DATABASE_URL = os.getenv("MIGRATION_TEST_DATABASE_URL", "").strip()
 LEGACY_PROBE_TABLE = "legacy_migration_probe_records"
-HEAD_REVISION = "20260714_0003"
+HEAD_REVISION = "20260714_0004"
 SERVER_DIR = Path(__file__).resolve().parents[1]
 ALEMBIC_INI_PATH = SERVER_DIR / "alembic.ini"
 
@@ -214,6 +214,18 @@ def _assert_head_schema(engine: Engine) -> None:
         "uq_ai_decisions_tenant_idempotency",
         ("tenant_id", "idempotency_key"),
     )
+    _assert_unique_constraint(
+        engine,
+        "ai_decisions",
+        "uq_ai_decisions_tenant_preview_decision",
+        ("tenant_id", "preview_decision_id"),
+    )
+    _assert_unique_constraint(
+        engine,
+        "ai_application_preview_decisions",
+        "uq_ai_application_preview_decisions_issue_request",
+        ("tenant_id", "actor_id", "auth_session_id", "issue_request_id"),
+    )
     _assert_unique_constraint(
         engine,
         "ai_decision_feedback",
@@ -265,6 +277,23 @@ def _assert_head_schema(engine: Engine) -> None:
             "ix_auth_sessions_tenant_username": ("tenant_id", "username"),
         },
     )
+    _assert_indexes(
+        engine,
+        "ai_application_preview_decisions",
+        {
+            "ix_ai_application_preview_decisions_actor_status_expiry": (
+                "tenant_id",
+                "actor_id",
+                "status",
+                "expires_at",
+            ),
+            "ix_ai_application_preview_decisions_conversation": (
+                "tenant_id",
+                "conversation_id",
+                "created_at",
+            ),
+        },
+    )
     _assert_indexes(
         engine,
         "ai_decisions",
@@ -305,6 +334,12 @@ def _assert_head_schema(engine: Engine) -> None:
     )
     _assert_cascade_foreign_key(engine, "expense_case_links")
     _assert_cascade_foreign_key(engine, "business_events")
+    _assert_composite_foreign_key(
+        engine,
+        "ai_decisions",
+        ("tenant_id", "preview_decision_id"),
+        "ai_application_preview_decisions",
+    )
     _assert_composite_foreign_key(
         engine,
         "ai_decisions",