feat: Refactor user context handling and service methods

- Updated middleware to fetch user and tenant models by ID and set them in context.
- Refactored common service methods to accept userID as a parameter instead of extracting from context.
- Modified content service methods to include userID as a parameter for better clarity and performance.
- Adjusted coupon, creator, notification, order, tenant, user, and wallet services to utilize userID directly.
- Enhanced context key constants for improved readability and maintainability.

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

@@ -8,6 +8,7 @@ import (
 	"mime/multipart"
 	"quyun/v2/app/http/v1/dto"
 	"quyun/v2/app/middlewares"
+	"quyun/v2/database/models"
 
 	"github.com/gofiber/fiber/v3"
 	log "github.com/sirupsen/logrus"
@@ -222,8 +223,9 @@ func (r *Routes) Register(router fiber.Router) {
 		PathParam[string]("contentId"),
 	))
 	r.log.Debugf("Registering route: Get /v1/me -> user.Me")
-	router.Get("/v1/me"[len(r.Path()):], DataFunc0(
+	router.Get("/v1/me"[len(r.Path()):], DataFunc1(
 		r.user.Me,
+		Local[*models.User]("__ctx_user"),
 	))
 	r.log.Debugf("Registering route: Get /v1/me/coupons -> user.MyCoupons")
 	router.Get("/v1/me/coupons"[len(r.Path()):], DataFunc1(