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/channel-test.go

@@ -13,6 +13,7 @@ import (
 	"one-api/common"
 	"one-api/constant"
 	"one-api/dto"
+	"one-api/logger"
 	"one-api/middleware"
 	"one-api/model"
 	"one-api/relay"
@@ -159,7 +160,7 @@ func testChannel(channel *model.Channel, testModel string) testResult {
 	// 创建一个用于日志的 info 副本，移除 ApiKey
 	logInfo := *info
 	logInfo.ApiKey = ""
-	common.SysLog(fmt.Sprintf("testing channel %d with model %s , info %+v ", channel.Id, testModel, logInfo))
+	logger.SysLog(fmt.Sprintf("testing channel %d with model %s , info %+v ", channel.Id, testModel, logInfo))
 
 	priceData, err := helper.ModelPriceHelper(c, info, 0, int(request.GetMaxTokens()))
 	if err != nil {
@@ -279,7 +280,7 @@ func testChannel(channel *model.Channel, testModel string) testResult {
 		Group:            info.UsingGroup,
 		Other:            other,
 	})
-	common.SysLog(fmt.Sprintf("testing channel #%d, response: \n%s", channel.Id, string(respBody)))
+	logger.SysLog(fmt.Sprintf("testing channel #%d, response: \n%s", channel.Id, string(respBody)))
 	return testResult{
 		context:     c,
 		localErr:    nil,
@@ -461,13 +462,13 @@ func TestAllChannels(c *gin.Context) {
 
 func AutomaticallyTestChannels(frequency int) {
 	if frequency <= 0 {
-		common.SysLog("CHANNEL_TEST_FREQUENCY is not set or invalid, skipping automatic channel test")
+		logger.SysLog("CHANNEL_TEST_FREQUENCY is not set or invalid, skipping automatic channel test")
 		return
 	}
 	for {
 		time.Sleep(time.Duration(frequency) * time.Minute)
-		common.SysLog("testing all channels")
+		logger.SysLog("testing all channels")
 		_ = testAllChannels(false)
-		common.SysLog("channel test finished")
+		logger.SysLog("channel test finished")
 	}
 }