feat(handler): 体检 HTTP 查询端点（T-302）

- GET /api/health-check/last（最近一次）+ /api/health-check/list（年度已检未检名单）
- 回写平台完整响应 Result.Raw，抽 writeRawOrError 共用
- last 按 idCard/phrid/empiId；list 按 checkYear(必填)+idCard+checkType
- 单测：路径/原样回写/缺参 400（脱敏假 OSI 后端）；默认仅绑本机

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

server.go

@@ -16,11 +16,16 @@ func runServer(cfg config.Config, addr string) error {
 	}
 
 	hr := handler.NewHealthRecordHandler(client)
+	hc := handler.NewHealthCheckHandler(client)
 	mux := http.NewServeMux()
 	mux.HandleFunc("/api/health-record/find", hr.Find)
+	mux.HandleFunc("/api/health-check/last", hc.Last)
+	mux.HandleFunc("/api/health-check/list", hc.List)
 
 	fmt.Printf("chis_osi server listening on %s\n", addr)
 	fmt.Printf("  GET http://%s/api/health-record/find?idCard=<身份证>\n", addr)
+	fmt.Printf("  GET http://%s/api/health-check/last?idCard=<身份证>\n", addr)
+	fmt.Printf("  GET http://%s/api/health-check/list?checkYear=<年度>&idCard=<身份证>\n", addr)
 
 	server := &http.Server{Addr: addr, Handler: mux}
 	return server.ListenAndServe()