fix: revert redis notifier watch change

Author: kx-byte

internal/mcp/storage/notifier/redis.go

@@ -64,20 +64,12 @@ func (r *RedisNotifier) Watch(ctx context.Context) (<-chan *config.MCPConfig, er
 
 	ch := make(chan *config.MCPConfig, 10)
 
-	// Capture the current tail before starting the watch loop so callers do not
-	// miss updates published immediately after Watch returns.
-	lastID := "0-0"
-	latest, err := r.client.XRevRangeN(ctx, r.streamName, "+", "-", 1).Result()
-	if err != nil && !errors.Is(err, redis.Nil) {
-		return nil, fmt.Errorf("failed to get stream tail: %w", err)
-	}
-	if len(latest) > 0 {
-		lastID = latest[0].ID
-	}
-
 	go func() {
 		defer close(ch)
 
+		// Start from the latest message ($ means read only new messages)
+		lastID := "$"
+
 		for {
 			select {
 			case <-ctx.Done():