اضافه شدن قابلیت share و نگهداری بلندمدت

backend/app/cleanup.py

@@ -11,7 +11,7 @@ log=logging.getLogger(__name__)
 def cleanup(batch=100):
     now=time.time(); removed=0
     with sessions().begin() as db:
-        q=select(Job).where(Job.expires_at<=now, or_(Job.status!='processing', Job.lease_until<now)).limit(batch)
+        q=select(Job).where(Job.expires_at != -1, Job.expires_at<=now, or_(Job.status!='processing', Job.lease_until<now)).limit(batch)
         if engine().dialect.name=='postgresql': q=q.with_for_update(skip_locked=True)
         for job in db.scalars(q):
             try: