feat(ai): add tenant-safe hierarchical expense learning

server/tests/test_migration_preflight.py

@@ -7,6 +7,7 @@ from sqlalchemy import Column, Integer, MetaData, Table, create_engine, text
 from sqlalchemy.engine import Engine
 
 from app.db.migration_preflight import (
+    LEGACY_ADOPTABLE_HISTORICAL_CASE_TABLES,
     MIGRATION_OWNED_TABLES_BY_REVISION,
     MigrationPreflightError,
     validate_migration_state,
@@ -46,9 +47,29 @@ def test_unversioned_database_without_migration_owned_tables_is_safe(engine: Eng
     assert state.owned_tables == frozenset()
 
 
+def test_unversioned_database_can_adopt_legacy_historical_case_tables(engine: Engine) -> None:
+    _create_tables(engine, LEGACY_ADOPTABLE_HISTORICAL_CASE_TABLES)
+
+    state = validate_migration_state(engine)
+
+    assert state.revision is None
+    assert state.owned_tables == LEGACY_ADOPTABLE_HISTORICAL_CASE_TABLES
+
+
+def test_revision_0007_accepts_partial_legacy_historical_case_tables(engine: Engine) -> None:
+    expected = MIGRATION_OWNED_TABLES_BY_REVISION["20260716_0007"]
+    adopted = frozenset({"risk_observations", "risk_observation_feedback"})
+    _create_tables(engine, expected | adopted)
+    _create_version_table(engine, "20260716_0007")
+
+    state = validate_migration_state(engine)
+
+    assert state.owned_tables == expected | adopted
+
+
 @pytest.mark.parametrize(
     "owned_table",
-    sorted(MIGRATION_OWNED_TABLES_BY_REVISION["20260716_0006"]),
+    sorted(MIGRATION_OWNED_TABLES_BY_REVISION["20260716_0007"]),
 )
 def test_unversioned_database_with_any_migration_owned_table_is_rejected(
     engine: Engine,
@@ -102,8 +123,19 @@ def test_known_revision_requires_and_accepts_its_exact_owned_table_set(
         ),
         (
             "20260716_0006",
-            MIGRATION_OWNED_TABLES_BY_REVISION["20260716_0006"]
-            - {"attachment_association_jobs"},
+            MIGRATION_OWNED_TABLES_BY_REVISION["20260716_0006"] - {"attachment_association_jobs"},
+        ),
+        (
+            "20260716_0007",
+            MIGRATION_OWNED_TABLES_BY_REVISION["20260716_0007"] - {"memory_entries"},
+        ),
+        (
+            "20260716_0008",
+            MIGRATION_OWNED_TABLES_BY_REVISION["20260716_0008"] - {"few_shot_samples"},
+        ),
+        (
+            "20260716_0009",
+            MIGRATION_OWNED_TABLES_BY_REVISION["20260716_0009"] - {"memory_entries"},
         ),
     ],
 )