feat: Implement notification service and integrate with user interactions

- Added notification service to handle sending and listing notifications.
- Integrated notification sending on user follow and order payment events.
- Updated user service to include fetching followed tenants.
- Enhanced content service to manage access control for content assets.
- Implemented logic for listing content topics based on genre.
- Updated creator service to manage content updates and pricing.
- Improved order service to include detailed order information and notifications.
- Added tests for notification CRUD operations and order details.

backend/app/http/v1/routes.gen.go

@@ -220,6 +220,10 @@ func (r *Routes) Register(router fiber.Router) {
 	router.Get("/v1/me/favorites"[len(r.Path()):], DataFunc0(
 		r.user.Favorites,
 	))
+	r.log.Debugf("Registering route: Get /v1/me/following -> user.Following")
+	router.Get("/v1/me/following"[len(r.Path()):], DataFunc0(
+		r.user.Following,
+	))
 	r.log.Debugf("Registering route: Get /v1/me/library -> user.Library")
 	router.Get("/v1/me/library"[len(r.Path()):], DataFunc0(
 		r.user.Library,
@@ -229,9 +233,10 @@ func (r *Routes) Register(router fiber.Router) {
 		r.user.Likes,
 	))
 	r.log.Debugf("Registering route: Get /v1/me/notifications -> user.Notifications")
-	router.Get("/v1/me/notifications"[len(r.Path()):], DataFunc1(
+	router.Get("/v1/me/notifications"[len(r.Path()):], DataFunc2(
 		r.user.Notifications,
 		QueryParam[string]("type"),
+		QueryParam[int]("page"),
 	))
 	r.log.Debugf("Registering route: Get /v1/me/orders -> user.ListOrders")
 	router.Get("/v1/me/orders"[len(r.Path()):], DataFunc1(