US05-06: Automate Phase E End-to-End Acceptance (#76)

photo_pipeline/jobs/worker.py

@@ -96,6 +96,16 @@ class Worker:
             return
         try:
             if cancelled or snapshot["state"] == JobState.CANCELLING:
+                # A handler may stop on its own — an upload batch cancelled through
+                # its own API never touches the job — so the job can still be
+                # ``running`` here. Record the request before the outcome: a stop is
+                # always observable as cancelling → cancelled, and ``running ->
+                # cancelled`` is not a legal jump. Without this hop the transition
+                # is rejected and the job keeps its lock forever.
+                if snapshot["state"] == JobState.RUNNING:
+                    self.service.transition(
+                        job_id, JobState.CANCELLING, worker_id=self.worker_id, fencing_token=token
+                    )
                 self.service.transition(
                     job_id, JobState.CANCELLED, worker_id=self.worker_id, fencing_token=token
                 )