feat(widgets): consolidate integration metadata + shared response caching (#6691)

packages/request-handler/src/notifications.ts

@@ -1,6 +1,6 @@
 import type { IntegrationKindByCategory } from "@homarr/definitions";
 import type { Notification } from "@homarr/integrations";
-import { createIntegrationAsync } from "@homarr/integrations";
+import { createIntegrationAsync } from "@homarr/integrations/factory";
 
 import { createIntegrationRequestHandler } from "./lib/integration-request-handler";
 
@@ -9,6 +9,7 @@ export const notificationsRequestHandler = createIntegrationRequestHandler<
   IntegrationKindByCategory<"notifications">,
   Record<string, never>
 >({
+  cacheNamespace: "notifications:list",
   async requestAsync(integration) {
     const integrationInstance = await createIntegrationAsync(integration);
     return await integrationInstance.getNotificationsAsync();