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>

cmd/server/main.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"gcy_hpc_server/internal/app"
+	"gcy_hpc_server/internal/config"
+	"gcy_hpc_server/internal/logger"
+
+	"go.uber.org/zap"
+)
+
+func main() {
+	cfgPath := ""
+	if len(os.Args) > 1 {
+		cfgPath = os.Args[1]
+	}
+	cfg, err := config.Load(cfgPath)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to load config: %v\n", err)
+		os.Exit(1)
+	}
+
+	zapLogger, err := logger.NewLogger(cfg.Log)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to init logger: %v\n", err)
+		os.Exit(1)
+	}
+	defer zapLogger.Sync()
+
+	application, err := app.NewApp(cfg, zapLogger)
+	if err != nil {
+		zapLogger.Fatal("failed to initialize application", zap.Error(err))
+	}
+	defer application.Close()
+
+	if err := application.Run(); err != nil {
+		zapLogger.Fatal("application error", zap.Error(err))
+	}
+}