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

middleware/auth.go

@@ -199,15 +199,19 @@ func TokenAuth() func(c *gin.Context) {
 			abortWithOpenAiMessage(c, http.StatusUnauthorized, err.Error())
 			return
 		}
-		userEnabled, err := model.IsUserEnabled(token.UserId, false)
+		userCache, err := model.GetUserCache(token.UserId)
 		if err != nil {
 			abortWithOpenAiMessage(c, http.StatusInternalServerError, err.Error())
 			return
 		}
+		userEnabled := userCache.Status == common.UserStatusEnabled
 		if !userEnabled {
 			abortWithOpenAiMessage(c, http.StatusForbidden, "用户已被封禁")
 			return
 		}
+
+		userCache.WriteContext(c)
+
 		c.Set("id", token.UserId)
 		c.Set("token_id", token.Id)
 		c.Set("token_key", token.Key)

middleware/distributor.go

@@ -32,7 +32,6 @@ func Distribute() func(c *gin.Context) {
 				return
 			}
 		}
-		userId := c.GetInt("id")
 		var channel *model.Channel
 		channelId, ok := c.Get("specific_channel_id")
 		modelRequest, shouldSelectChannel, err := getModelRequest(c)
@@ -40,7 +39,7 @@ func Distribute() func(c *gin.Context) {
 			abortWithOpenAiMessage(c, http.StatusBadRequest, "Invalid request, "+err.Error())
 			return
 		}
-		userGroup, _ := model.GetUserGroup(userId, false)
+		userGroup := c.GetString(constant.ContextKeyUserGroup)
 		tokenGroup := c.GetString("token_group")
 		if tokenGroup != "" {
 			// check common.UserUsableGroups[userGroup]