feat: 添加应用骨架，配置化 zap 日志贯穿全链路

- cmd/server/main.go: 使用 logger.NewLogger(cfg.Log) 替代 zap.NewProduction()

- internal/app: 依赖注入组装 DB/Slurm/Service/Handler，传递 logger

- internal/middleware: RequestLogger 请求日志中间件

- internal/server: 统一响应格式和路由注册

- go.mod: module 更名为 gcy_hpc_server，添加 gin/zap/lumberjack/gorm 依赖

- 日志初始化失败时 fail fast (os.Exit(1))

- GormLevel 从配置传递到 NewGormDB，支持 YAML 独立配置

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/server/response_test.go

@@ -0,0 +1,116 @@
+package server
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+)
+
+func setupTestContext() (*httptest.ResponseRecorder, *gin.Context) {
+	gin.SetMode(gin.TestMode)
+	w := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(w)
+	return w, c
+}
+
+func parseResponse(t *testing.T, w *httptest.ResponseRecorder) APIResponse {
+	t.Helper()
+	var resp APIResponse
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("failed to parse response body: %v", err)
+	}
+	return resp
+}
+
+func TestOK(t *testing.T) {
+	w, c := setupTestContext()
+	OK(c, map[string]string{"msg": "hello"})
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+	resp := parseResponse(t, w)
+	if !resp.Success {
+		t.Fatal("expected success=true")
+	}
+}
+
+func TestCreated(t *testing.T) {
+	w, c := setupTestContext()
+	Created(c, map[string]int{"id": 1})
+
+	if w.Code != http.StatusCreated {
+		t.Fatalf("expected 201, got %d", w.Code)
+	}
+	resp := parseResponse(t, w)
+	if !resp.Success {
+		t.Fatal("expected success=true")
+	}
+}
+
+func TestBadRequest(t *testing.T) {
+	w, c := setupTestContext()
+	BadRequest(c, "invalid input")
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("expected 400, got %d", w.Code)
+	}
+	resp := parseResponse(t, w)
+	if resp.Success {
+		t.Fatal("expected success=false")
+	}
+	if resp.Error != "invalid input" {
+		t.Fatalf("expected error 'invalid input', got '%s'", resp.Error)
+	}
+}
+
+func TestNotFound(t *testing.T) {
+	w, c := setupTestContext()
+	NotFound(c, "resource missing")
+
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("expected 404, got %d", w.Code)
+	}
+	resp := parseResponse(t, w)
+	if resp.Success {
+		t.Fatal("expected success=false")
+	}
+	if resp.Error != "resource missing" {
+		t.Fatalf("expected error 'resource missing', got '%s'", resp.Error)
+	}
+}
+
+func TestInternalError(t *testing.T) {
+	w, c := setupTestContext()
+	InternalError(c, "something broke")
+
+	if w.Code != http.StatusInternalServerError {
+		t.Fatalf("expected 500, got %d", w.Code)
+	}
+	resp := parseResponse(t, w)
+	if resp.Success {
+		t.Fatal("expected success=false")
+	}
+	if resp.Error != "something broke" {
+		t.Fatalf("expected error 'something broke', got '%s'", resp.Error)
+	}
+}
+
+func TestErrorWithStatus(t *testing.T) {
+	w, c := setupTestContext()
+	ErrorWithStatus(c, http.StatusConflict, "already exists")
+
+	if w.Code != http.StatusConflict {
+		t.Fatalf("expected 409, got %d", w.Code)
+	}
+	resp := parseResponse(t, w)
+	if resp.Success {
+		t.Fatal("expected success=false")
+	}
+	if resp.Error != "already exists" {
+		t.Fatalf("expected error 'already exists', got '%s'", resp.Error)
+	}
+}