feat: 更新Go版本至1.23.0，并添加Swagger测试用例以验证生成的Swagger规范

atsf_server/go.mod

@@ -1,7 +1,7 @@
 module atsflare
 
 // +heroku goVersion go1.18
-go 1.18
+go 1.23.0
 
 require (
 	github.com/gin-contrib/cors v1.4.0

atsf_server/router/swagger_test.go

@@ -0,0 +1,21 @@
+package router_test
+
+import (
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestGeneratedSwaggerSpecExists(t *testing.T) {
+	data, err := os.ReadFile("../docs/swagger.json")
+	if err != nil {
+		t.Fatalf("failed to read generated swagger spec: %v", err)
+	}
+	content := string(data)
+	if !strings.Contains(content, "\"title\": \"ATSFlare Server API\"") {
+		t.Fatal("expected swagger spec title to exist")
+	}
+	if !strings.Contains(content, "\"/api/proxy-routes/\"") {
+		t.Fatal("expected swagger spec to contain proxy route endpoint")
+	}
+}