V4.5 Complete - Enhanced trancription context, added option to restranscribe source under different models.

tests/test_db.py

@@ -172,11 +172,23 @@ async def test_v42_upgrade_adds_evidence_tables_without_rewriting_legacy_snapsho
         await upgrade_schema(engine=runtime.engine)
         async with runtime.engine.connect() as connection:
             table_names = set(await connection.run_sync(lambda c: inspect(c).get_table_names()))
+            job_columns = set(
+                await connection.run_sync(
+                    lambda c: tuple(column["name"] for column in inspect(c).get_columns("job"))
+                )
+            )
+            source_columns = set(
+                await connection.run_sync(
+                    lambda c: tuple(column["name"] for column in inspect(c).get_columns("source"))
+                )
+            )
             legacy_snapshot = (
                 await connection.execute(text("SELECT raw_api_response FROM job_source WHERE id = 'link-1'"))
             ).scalar_one()
 
         assert {"execution_attempt", "processing_artifact"}.issubset(table_names)
+        assert "purpose" in job_columns
+        assert "preferred_execution_attempt_id" in source_columns
         assert "legacy" in legacy_snapshot
     finally:
         await dispose_database_runtime()