Improve error message when task not found

The error has been raised a few times but the cause hasn't been found.
Adding the representation of the job should help debugging.

app/tasks.py

@@ -55,7 +55,10 @@ class TaskWorker(Worker):
                 self.log.warning("task not found...")
                 time.sleep(1)
         else:
-            self.log.error(f"Task {job.id} not found! Task attribute not updated!")
+            self.log.error(
+                f"Task {job.id} not found for job: {job.get_call_string()}!"
+                " Task attribute not updated!"
+            )
             return
         for name, value in attributes.items():
             setattr(task, name, value)