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/controller/api/peer.go

@@ -15,11 +15,11 @@ type Peer struct {
 
 // SysInfo
 // @Tags System
-// @Summary 提交系统信息
-// @Description 提交系统信息
+// @Summary submit system info
+// @Description submit system info
 // @Accept  json
 // @Produce  json
-// @Param body body requstform.PeerForm true "系统信息表单"
+// @Param body body requstform.PeerForm true "system info form"
 // @Success 200 {string} string "SYSINFO_UPDATED,ID_NOT_FOUND"
 // @Failure 500 {object} response.ErrorResponse
 // @Router /sysinfo [post]
@@ -52,25 +52,25 @@ func (p *Peer) SysInfo(c *gin.Context) {
 			return
 		}
 	}
-	//SYSINFO_UPDATED 上传成功
-	//ID_NOT_FOUND 下次心跳会上传
-	//直接响应文本
+	//SYSINFO_UPDATED upload successful
+	//ID_NOT_FOUND will be uploaded on the next heartbeat
+	//respond with text directly
 	c.String(http.StatusOK, "SYSINFO_UPDATED")
 }
 
 // SysInfoVer
 // @Tags System
-// @Summary 获取系统版本信息
-// @Description 获取系统版本信息
+// @Summary get system version info
+// @Description get system version info
 // @Accept  json
 // @Produce  json
 // @Success 200 {string} string ""
 // @Failure 500 {object} response.ErrorResponse
 // @Router /sysinfo_ver [post]
 func (p *Peer) SysInfoVer(c *gin.Context) {
-	//读取resources/version文件
+	// read the resources/version file
 	v := service.AllService.AppService.GetAppVersion()
-	// 加上启动时间，方便client上传信息
+	// add the start time so the client can conveniently upload info
 	v = fmt.Sprintf("%s\n%s", v, service.AllService.AppService.GetStartTime())
 	c.String(http.StatusOK, v)
 }