refactor: Introduce pre-consume quota and unify relay handlers

This commit introduces a major architectural refactoring to improve quota management, centralize logging, and streamline the relay handling logic.

Key changes:
- **Pre-consume Quota:** Implements a new mechanism to check and reserve user quota *before* making the request to the upstream provider. This ensures more accurate quota deduction and prevents users from exceeding their limits due to concurrent requests.

- **Unified Relay Handlers:** Refactors the relay logic to use generic handlers (e.g., `ChatHandler`, `ImageHandler`) instead of provider-specific implementations. This significantly reduces code duplication and simplifies adding new channels.

- **Centralized Logger:** A new dedicated `logger` package is introduced, and all system logging calls are migrated to use it, moving this responsibility out of the `common` package.

- **Code Reorganization:** DTOs are generalized (e.g., `dalle.go` -> `openai_image.go`) and utility code is moved to more appropriate packages (e.g., `common/http.go` -> `service/http.go`) for better code structure.

controller/topup.go

@@ -5,6 +5,7 @@ import (
 	"log"
 	"net/url"
 	"one-api/common"
+	"one-api/logger"
 	"one-api/model"
 	"one-api/service"
 	"one-api/setting"
@@ -231,7 +232,7 @@ func EpayNotify(c *gin.Context) {
 				return
 			}
 			log.Printf("易支付回调更新用户成功 %v", topUp)
-			model.RecordLog(topUp.UserId, model.LogTypeTopup, fmt.Sprintf("使用在线充值成功，充值金额: %v，支付金额：%f", common.LogQuota(quotaToAdd), topUp.Money))
+			model.RecordLog(topUp.UserId, model.LogTypeTopup, fmt.Sprintf("使用在线充值成功，充值金额: %v，支付金额：%f", logger.LogQuota(quotaToAdd), topUp.Money))
 		}
 	} else {
 		log.Printf("易支付异常回调: %v", verifyInfo)