Implement FCM

internal/processor/user_processor.go

@@ -253,3 +253,17 @@ func (p *UserProcessorImpl) UpdateUserOutlet(ctx context.Context, userID uuid.UU
 
 	return mappers.UserEntityToResponse(existingUser), nil
 }
+
+func (p *UserProcessorImpl) UpdateFcmToken(ctx context.Context, userID uuid.UUID, fcmToken string) error {
+	_, err := p.userRepo.GetByID(ctx, userID)
+	if err != nil {
+		return fmt.Errorf("user not found: %w", err)
+	}
+
+	err = p.userRepo.UpdateFcmToken(ctx, userID, fcmToken)
+	if err != nil {
+		return fmt.Errorf("failed to update FCM token: %w", err)
+	}
+
+	return nil
+}