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/server_test.go

@@ -0,0 +1,108 @@
+package server
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+)
+
+func TestAllRoutesRegistered(t *testing.T) {
+	r := NewTestRouter()
+	routes := r.Routes()
+
+	expected := []struct {
+		method string
+		path   string
+	}{
+		{"POST", "/api/v1/jobs/submit"},
+		{"GET", "/api/v1/jobs"},
+		{"GET", "/api/v1/jobs/history"},
+		{"GET", "/api/v1/jobs/:id"},
+		{"DELETE", "/api/v1/jobs/:id"},
+		{"GET", "/api/v1/nodes"},
+		{"GET", "/api/v1/nodes/:name"},
+		{"GET", "/api/v1/partitions"},
+		{"GET", "/api/v1/partitions/:name"},
+		{"GET", "/api/v1/diag"},
+		{"GET", "/api/v1/templates"},
+		{"POST", "/api/v1/templates"},
+		{"GET", "/api/v1/templates/:id"},
+		{"PUT", "/api/v1/templates/:id"},
+		{"DELETE", "/api/v1/templates/:id"},
+	}
+
+	routeMap := map[string]bool{}
+	for _, route := range routes {
+		key := route.Method + " " + route.Path
+		routeMap[key] = true
+	}
+
+	for _, exp := range expected {
+		key := exp.method + " " + exp.path
+		if !routeMap[key] {
+			t.Errorf("missing route: %s", key)
+		}
+	}
+
+	if len(routes) < len(expected) {
+		t.Errorf("expected at least %d routes, got %d", len(expected), len(routes))
+	}
+}
+
+func TestUnregisteredPathReturns404(t *testing.T) {
+	r := NewTestRouter()
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest(http.MethodGet, "/api/v1/nonexistent", nil)
+	r.ServeHTTP(w, req)
+
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("expected 404 for unregistered path, got %d", w.Code)
+	}
+}
+
+func TestRegisteredPathReturns501(t *testing.T) {
+	r := NewTestRouter()
+
+	endpoints := []struct {
+		method string
+		path   string
+	}{
+		{"GET", "/api/v1/jobs"},
+		{"GET", "/api/v1/nodes"},
+		{"GET", "/api/v1/partitions"},
+		{"GET", "/api/v1/diag"},
+		{"GET", "/api/v1/templates"},
+	}
+
+	for _, ep := range endpoints {
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest(ep.method, ep.path, nil)
+		r.ServeHTTP(w, req)
+
+		if w.Code != http.StatusNotImplemented {
+			t.Fatalf("%s %s: expected 501, got %d", ep.method, ep.path, w.Code)
+		}
+
+		var resp APIResponse
+		if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+			t.Fatalf("failed to parse response: %v", err)
+		}
+		if resp.Success {
+			t.Fatal("expected success=false")
+		}
+		if resp.Error != "not implemented" {
+			t.Fatalf("expected error 'not implemented', got '%s'", resp.Error)
+		}
+	}
+}
+
+func TestRouterUsesGinMode(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	r := NewTestRouter()
+	if r == nil {
+		t.Fatal("NewRouter returned nil")
+	}
+}