fix: stop subscription if ctx is cancelled during connection

internal/nostr/nostr.go

@@ -702,12 +702,18 @@ func (svc *Service) startSubscription(ctx context.Context, subscription *Subscri
 	waitToReconnectSeconds := 0
 
 	for {
-		// close relays with connection errors before connecting again
-		// because context expiration has no effect on relays
-		// TODO: Call relay.Connect on already initialized relays
+		// context expiration has no effect on relays
 		if relay != nil && relay.Connection != nil && isCustomRelay {
 			relay.Close()
 		}
+		if ctx.Err() != nil {
+			svc.Logger.WithFields(logrus.Fields{
+				"subscription_id": subscription.ID,
+				"relay_url":       subscription.RelayUrl,
+			}).Debug("Context canceled, stopping subscription")
+			svc.stopSubscription(subscription)
+			return
+		}
 		time.Sleep(time.Duration(waitToReconnectSeconds) * time.Second)
 		relay, isCustomRelay, err = svc.getRelayConnection(ctx, subscription.RelayUrl)
 		if err != nil {