chore: 更新依赖、配置和代码生成

主要更新：
- 更新 go.mod/go.sum 依赖
- 重新生成 Ent ORM 代码
- 更新 Wire 依赖注入配置
- 添加 docker-compose.override.yml 到 .gitignore
- 更新 README 文档（Simple Mode 说明和已知问题）
- 清理调试日志
- 其他代码优化和格式修复

backend/internal/setup/cli.go

@@ -1,4 +1,3 @@
-// Package setup provides CLI-based installation wizard for initial system configuration.
 package setup
 
 import (

backend/internal/setup/setup.go

@@ -345,7 +345,7 @@ func writeConfigFile(cfg *SetupConfig) error {
 		Default struct {
 			UserConcurrency int     `yaml:"user_concurrency"`
 			UserBalance     float64 `yaml:"user_balance"`
-			APIKeyPrefix    string  `yaml:"api_key_prefix"`
+			ApiKeyPrefix    string  `yaml:"api_key_prefix"`
 			RateMultiplier  float64 `yaml:"rate_multiplier"`
 		} `yaml:"default"`
 		RateLimit struct {
@@ -367,12 +367,12 @@ func writeConfigFile(cfg *SetupConfig) error {
 		Default: struct {
 			UserConcurrency int     `yaml:"user_concurrency"`
 			UserBalance     float64 `yaml:"user_balance"`
-			APIKeyPrefix    string  `yaml:"api_key_prefix"`
+			ApiKeyPrefix    string  `yaml:"api_key_prefix"`
 			RateMultiplier  float64 `yaml:"rate_multiplier"`
 		}{
 			UserConcurrency: 5,
 			UserBalance:     0,
-			APIKeyPrefix:    "sk-",
+			ApiKeyPrefix:    "sk-",
 			RateMultiplier:  1.0,
 		},
 		RateLimit: struct {