fix: nil pushHandler crash in message Create

internal/message/handlers.go

@@ -31,9 +31,11 @@ type Handler_old struct {
 
 func NewHandler(db *sql.DB, hub *gateway.Hub, pushHandler *push.Handler, logger *slog.Logger) *Handler {
 	return &Handler{
-		db:       db,
-		hub:      hub,
-		mentions: NewMentionHandler(db, pushHandler, logger),
+		db:          db,
+		hub:         hub,
+		mentions:    NewMentionHandler(db, pushHandler, logger),
+		pushHandler: pushHandler,
+		logger:      logger,
 	}
 }