canonicalheader 8→0 + usestdlibvars 3→0：header key 改为 Go 规范大小写（wire 格式本就如此，纯代码修正）、HTTP 方法常量替代字符串字面量。

Result: {"status":"keep","total_issues":45,"golint_canonicalheader":0,"golint_errname":1,"golint_errorlint":12,"golint_forcetypeassert":3,"golint_gosec":0,"golint_intrange":3,"golint_modernize":5,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":3,"golint_recvcheck":7,"golint_usestdlibvars":0,"golint_wastedassign":7,"golint_total":44,"eslint_problems":1,"eslint_errors":0,"eslint_warnings":1,"tsc_errors":0,"measure_s":38}

internal/apps/agent/observability/openresty_local.go

@@ -62,7 +62,7 @@ func CollectEdgeHealth(ctx context.Context, cfg *config.Config) *EdgeHealthSnaps
 }
 
 func fetchLocalJSON(ctx context.Context, client *http.Client, url string, target any) error {
-	req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
 	if err != nil {
 		return err
 	}