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.

service/error.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"one-api/common"
 	"one-api/dto"
+	"one-api/logger"
 	"one-api/types"
 	"strconv"
 	"strings"
@@ -58,7 +59,7 @@ func ClaudeErrorWrapper(err error, code string, statusCode int) *dto.ClaudeError
 	lowerText := strings.ToLower(text)
 	if !strings.HasPrefix(lowerText, "get file base64 from url") {
 		if strings.Contains(lowerText, "post") || strings.Contains(lowerText, "dial") || strings.Contains(lowerText, "http") {
-			common.SysLog(fmt.Sprintf("error: %s", text))
+			logger.SysLog(fmt.Sprintf("error: %s", text))
 			text = "请求上游地址失败"
 		}
 	}
@@ -85,7 +86,7 @@ func RelayErrorHandler(resp *http.Response, showBodyWhenFail bool) (newApiErr *t
 	if err != nil {
 		return
 	}
-	common.CloseResponseBodyGracefully(resp)
+	CloseResponseBodyGracefully(resp)
 	var errResponse dto.GeneralErrorResponse
 
 	err = common.Unmarshal(responseBody, &errResponse)
@@ -138,7 +139,7 @@ func TaskErrorWrapper(err error, code string, statusCode int) *dto.TaskError {
 	text := err.Error()
 	lowerText := strings.ToLower(text)
 	if strings.Contains(lowerText, "post") || strings.Contains(lowerText, "dial") || strings.Contains(lowerText, "http") {
-		common.SysLog(fmt.Sprintf("error: %s", text))
+		logger.SysLog(fmt.Sprintf("error: %s", text))
 		text = "请求上游地址失败"
 	}
 	//避免暴露内部错误