fix(tests): update mocks to simulate job detail status updates

Fix two failing unit tests by making mock executors properly simulate
the job detail status updates that real ModelDayExecutor performs:

- test_run_updates_job_status_to_completed
- test_run_handles_partial_failure

Root cause: Tests mocked ModelDayExecutor but didn't simulate the
update_job_detail_status() calls. The implementation relies on these
calls to automatically transition job status from pending to
completed/partial/failed.

Solution: Mock executors now call manager.update_job_detail_status()
to properly simulate the status update lifecycle:
1. Update to "running" when execution starts
2. Update to "completed" or "failed" when execution finishes

This matches the real ModelDayExecutor behavior and allows the
automatic job status transition logic in JobManager to work correctly.

tests/unit/test_simulation_worker.py

@@ -129,15 +129,24 @@ class TestSimulationWorkerExecution:
         # Mock _prepare_data to return the date
         worker._prepare_data = Mock(return_value=(["2025-01-16"], []))
 
-        with patch("api.simulation_worker.ModelDayExecutor") as mock_executor_class:
+        def create_mock_executor(job_id, date, model_sig, config_path, db_path):
+            """Create mock executor that simulates job detail status updates."""
             mock_executor = Mock()
-            mock_executor.execute.return_value = {
-                "success": True,
-                "model": "gpt-5",
-                "date": "2025-01-16"
-            }
-            mock_executor_class.return_value = mock_executor
 
+            def mock_execute():
+                # Simulate ModelDayExecutor status updates
+                manager.update_job_detail_status(job_id, date, model_sig, "running")
+                manager.update_job_detail_status(job_id, date, model_sig, "completed")
+                return {
+                    "success": True,
+                    "model": model_sig,
+                    "date": date
+                }
+
+            mock_executor.execute = mock_execute
+            return mock_executor
+
+        with patch("api.simulation_worker.ModelDayExecutor", side_effect=create_mock_executor):
             worker.run()
 
         # Check job status
@@ -163,18 +172,29 @@ class TestSimulationWorkerExecution:
 
         call_count = 0
 
-        def mixed_results(*args, **kwargs):
+        def mixed_results(job_id, date, model_sig, config_path, db_path):
+            """Create mock executor with mixed success/failure results."""
             nonlocal call_count
-            executor = Mock()
+            mock_executor = Mock()
             # First model succeeds, second fails
             success = (call_count == 0)
-            executor.execute.return_value = {
-                "success": success,
-                "model": kwargs.get("model_sig", "unknown"),
-                "date": kwargs.get("date", "2025-01-16")
-            }
             call_count += 1
-            return executor
+
+            def mock_execute():
+                # Simulate ModelDayExecutor status updates
+                manager.update_job_detail_status(job_id, date, model_sig, "running")
+                if success:
+                    manager.update_job_detail_status(job_id, date, model_sig, "completed")
+                else:
+                    manager.update_job_detail_status(job_id, date, model_sig, "failed", error="Model failed")
+                return {
+                    "success": success,
+                    "model": model_sig,
+                    "date": date
+                }
+
+            mock_executor.execute = mock_execute
+            return mock_executor
 
         with patch("api.simulation_worker.ModelDayExecutor", side_effect=mixed_results):
             worker.run()