feat: add bounded task priority and fair application dispatch

internal/storage/mysql/worker_sessions.go

@@ -118,6 +118,9 @@ func (s *ExecutionStore) Connect(ctx context.Context, token auth.Token, in worke
 			return err
 		}
 		binding = worker.Binding{InstanceID: in.InstanceID, SessionID: session, Epoch: epoch + 1, Proof: proof}
+		if err := tx.QueryRowContext(ctx, `SELECT application_id FROM orbit_namespaces WHERE id=?`, token.NamespaceID).Scan(&binding.ApplicationID); err != nil {
+			return err
+		}
 		state := sessionState{queue: in.QueueID, capacity: in.Capacity, draining: draining, expires: now.Add(s.options.SessionTTL), capabilities: in.Capabilities, concurrencyKeys: in.ConcurrencyKeys}
 		caps, err := json.Marshal(in.Capabilities)
 		if err != nil {