feat(inboxes): queue template sync jobs

internal/handler/api/v1/inbox_handler.go

@@ -656,13 +656,17 @@ func (h *InboxHandler) SyncTemplates(c *gin.Context) {
 		return
 	}
 
-	templates, svcErr := h.svc.SyncTemplates(c.Request.Context(), accountID, inboxID)
+	svcErr := h.svc.SyncTemplates(c.Request.Context(), accountID, inboxID)
 	if svcErr != nil {
+		if errors.Is(svcErr, service.ErrInboxTemplateSyncWhatsAppOnly) {
+			c.JSON(http.StatusUnprocessableEntity, gin.H{"error": service.InboxTemplateSyncWhatsAppOnlyMessage})
+			return
+		}
 		handleServiceError(c, svcErr)
 		return
 	}
 
-	c.JSON(http.StatusOK, gin.H{"templates": templates})
+	c.JSON(http.StatusOK, gin.H{"message": service.InboxTemplateSyncInitiatedMessage})
 }
 
 // RegisterWebhook registers a webhook URL with the channel provider for an inbox.