i18n: Translate all Chinese to English across the codebase

Translate Chinese comments, log/error messages, validator labels and
Swagger annotations to English throughout the source code, generated
Swagger docs, config files and CI workflows.

Make the English README primary: README.md now holds the English docs
and README_EN.md holds the Chinese version, with cross-language links
updated accordingly.

Note: the generated docs/ swagger files were translated in place; run
`go generate ./...` (swag init) to regenerate them from the now-English
annotations when a Go toolchain is available.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

http/http.go

@@ -25,7 +25,7 @@ func ApiInit() {
 	}
 
 	if global.Config.Gin.Mode == gin.ReleaseMode {
-		//修改gin Recovery日志 输出为logger的输出点
+		// redirect gin's Recovery log output to the logger's output
 		if global.Logger != nil {
 			gin.DefaultErrorWriter = global.Logger.WriterLevel(logrus.ErrorLevel)
 		}