refactor: Enhance user context and quota management

- Add new context keys for user-related information
- Modify user cache and authentication middleware to populate context
- Refactor quota and notification services to use context-based user data
- Remove redundant database queries by leveraging context information
- Update various components to use new context-based user retrieval methods

constant/context_key.go

@@ -2,4 +2,9 @@ package constant
 
 const (
 	ContextKeyRequestStartTime = "request_start_time"
+	ContextKeyUserSetting      = "user_setting"
+	ContextKeyUserQuota        = "user_quota"
+	ContextKeyUserStatus       = "user_status"
+	ContextKeyUserEmail        = "user_email"
+	ContextKeyUserGroup        = "user_group"
 )