Added celery task for resuming archiving flamenco jobs that got stuck in status "archiving".

Jobs are considered stuck if they are in status "archiving" and hasn't been updated in a day.

docker/4_run/config_local.py

@@ -113,6 +113,10 @@ CELERY_BEAT_SCHEDULE = {
         'schedule': 600,  # every N seconds
         'args': ('gcs', 500)
     },
+    'flamenco-resume-job-archiving': {
+        'task': 'flamenco.celery.job_archival.resume_job_archiving',
+        'schedule': 600,  # every N seconds
+    },
 }
 
 SVNMAN_REPO_URL = 'https://svn.blender.cloud/repo/'