feat: 实现用户注册功能，包括数据库表结构、gRPC 服务和业务逻辑

backend/services/user-svc/cmd/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"backend/services/user-svc/internal/config"
+	"backend/services/user-svc/internal/grpcserver"
+	"backend/services/user-svc/internal/repository"
+	"backend/services/user-svc/internal/service"
+	"backend/shared/pkg/database"
+	"backend/shared/pkg/logger"
+)
+
+func main() {
+	// 加载配置
+	cfg, err := config.Load()
+	if err != nil {
+		log.Fatalf("Failed to load config: %v", err)
+	}
+
+	// 连接数据库
+	db, err := database.NewPostgresDB(database.PostgresConfig{
+		Host:     cfg.Database.Host,
+		Port:     cfg.Database.Port,
+		User:     cfg.Database.User,
+		Password: cfg.Database.Password,
+		DBName:   cfg.Database.DBName,
+		SSLMode:  cfg.Database.SSLMode,
+	})
+	if err != nil {
+		log.Fatalf("Failed to connect to database: %v", err)
+	}
+	defer db.Close()
+
+	// 初始化仓库
+	repo := repository.NewUserRepository(db.DB)
+
+	// 初始化服务
+	userService := service.NewUserService(repo)
+
+	// 启动 gRPC 服务器
+	serverAddr := fmt.Sprintf(":%d", cfg.Server.Port)
+	logger.Info("User service starting on %s", serverAddr)
+
+	if err := grpcserver.Start(userService, cfg.Server.Port); err != nil {
+		log.Fatalf("Failed to start server: %v", err)
+	}
+}