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.

model/topup.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"one-api/common"
+	"one-api/logger"
 
 	"gorm.io/gorm"
 )
@@ -94,7 +95,7 @@ func Recharge(referenceId string, customerId string) (err error) {
 		return errors.New("充值失败，" + err.Error())
 	}
 
-	RecordLog(topUp.UserId, LogTypeTopup, fmt.Sprintf("使用在线充值成功，充值金额: %v，支付金额：%d", common.FormatQuota(int(quota)), topUp.Amount))
+	RecordLog(topUp.UserId, LogTypeTopup, fmt.Sprintf("使用在线充值成功，充值金额: %v，支付金额：%d", logger.FormatQuota(int(quota)), topUp.Amount))
 
 	return nil
 }