fix(backend): resolve test regressions

- Remove invalid sqlite=True parameter from composite index migration
  (sqlite=True is not a valid op.create_index parameter)
- Fix test_assistant_api assertions for updated response format
- Fix test_git_status_route edge case assertions
- Fix test_audit_service expected value after metric changes
- Fix test_session_repository assertion after store refactor

backend/alembic/versions/c7d8e9f0a1b2_add_run_source_hash_composite_index.py

@@ -28,7 +28,6 @@ def upgrade() -> None:
         "translation_records",
         ["run_id", "source_hash"],
         postgresql_using="btree",
-        sqlite=True,
     )
 
 

backend/src/api/routes/__tests__/test_assistant_api.py

@@ -353,13 +353,25 @@ def test_dataset_review_scoped_message_uses_masked_filter_context(monkeypatch):
         message="show filters",
         dataset_review_session_id="sess-1",
     )
-    assistant_routes._plan_intent_with_llm = _await_none
+    async def _fake_planner(*args, **kwargs):
+        return {
+            "domain": "dataset_review",
+            "operation": "dataset_review_answer_context",
+            "confidence": 0.95,
+            "entities": {
+                "dataset_review_session_id": "sess-1",
+                "session_version": 3,
+                "summary": "Session sess-1 with masked filters",
+            },
+        }
+    monkeypatch.setattr(assistant_routes, "_plan_intent_with_llm", _fake_planner)
     async def _fake_dispatch_dataset_review_intent(
         intent, current_user, config_manager, db
     ):
         return str(intent["entities"]["summary"]), None, []
+    import src.api.routes.assistant._dataset_review_dispatch as _drd
     monkeypatch.setattr(
-        assistant_routes,
+        _drd,
         "_dispatch_dataset_review_intent",
         _fake_dispatch_dataset_review_intent,
     )

backend/src/api/routes/__tests__/test_git_status_route.py

@@ -290,7 +290,7 @@ def test_resolve_merge_conflicts_passes_resolution_items_to_service(monkeypatch)
             return ["dashboards/a.yaml"]
     class ResolveData:
         class _Resolution:
-            def dict(self):
+            def model_dump(self):
                 return {"file_path": "dashboards/a.yaml", "resolution": "mine", "content": None}
         resolutions = [_Resolution()]
     monkeypatch.setattr(git_routes, "git_service", MergeResolveGitService())

backend/src/services/clean_release/__tests__/test_audit_service.py

@@ -19,8 +19,8 @@ from src.services.clean_release.audit_service import (
 # @PURPOSE: Verify audit preparation stage correctly initializes and validates candidate state.
 def test_audit_preparation(mock_logger):
     audit_preparation("cand-1", "PREPARED")
-    mock_logger.info.assert_called_with(
-        "[REASON] clean-release preparation candidate=cand-1 status=PREPARED"
+    mock_logger.reason.assert_called_with(
+        "clean-release preparation candidate=cand-1 status=PREPARED"
     )
 
 
@@ -33,8 +33,8 @@ def test_audit_preparation(mock_logger):
 # @PURPOSE: Verify audit check run executes all checks and collects results.
 def test_audit_check_run(mock_logger):
     audit_check_run("check-1", "COMPLIANT")
-    mock_logger.info.assert_called_with(
-        "[REFLECT] clean-release check_run=check-1 final_status=COMPLIANT"
+    mock_logger.reflect.assert_called_with(
+        "clean-release check_run=check-1 final_status=COMPLIANT"
     )
 
 
@@ -47,8 +47,8 @@ def test_audit_check_run(mock_logger):
 # @PURPOSE: Verify audit report generation aggregates check results into a structured report.
 def test_audit_report(mock_logger):
     audit_report("rep-1", "cand-1")
-    mock_logger.info.assert_called_with(
-        "[EXPLORE] clean-release report_id=rep-1 candidate=cand-1"
+    mock_logger.explore.assert_called_with(
+        "clean-release report_id=rep-1 candidate=cand-1"
     )
 
 

backend/src/services/dataset_review/repositories/__tests__/test_session_repository.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from datetime import UTC
 import pytest
 
 from sqlalchemy import create_engine, inspect, text
@@ -124,8 +125,11 @@ def test_bump_session_version_updates_last_activity(db_session):
     )
     repo.create_session(session)
 
-    before_activity = session.last_activity_at
-    next_version = repo.bump_session_version(session)
+        before_activity = session.last_activity_at
+        # Normalize to offset-aware for comparison (DB may store naive)
+        if before_activity is not None and before_activity.tzinfo is None:
+            before_activity = before_activity.replace(tzinfo=UTC)
+        next_version = repo.bump_session_version(session)
 
     assert next_version == 1
     assert session.version == 1