Initial commit: Material Texture API service

- Go + Gin + GORM + PostgreSQL backend
- RESTful API for material management
- Docker deployment support
- Database partitioning for billion-scale data
- API documentation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

cmd/server/main.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"log"
+
+	"material_texture/internal/config"
+	"material_texture/internal/models"
+	"material_texture/internal/router"
+)
+
+func main() {
+	// 加载配置
+	cfg := config.Load()
+
+	// 连接数据库
+	db := config.NewDatabase(cfg)
+
+	// 自动迁移表结构
+	if err := db.AutoMigrate(&models.Material{}, &models.MaterialBinding{}); err != nil {
+		log.Fatalf("Failed to migrate database: %v", err)
+	}
+
+	// 添加唯一约束（GORM的uniqueIndex在某些情况下可能不生效）
+	db.Exec(`CREATE UNIQUE INDEX IF NOT EXISTS idx_unique_material_group
+		ON material_bindings(material_id, group_id)`)
+
+	log.Println("Database migrated successfully")
+
+	// 设置路由
+	r := router.Setup(db, cfg)
+
+	// 启动服务器
+	log.Printf("Server starting on port %s", cfg.ServerPort)
+	if err := r.Run(":" + cfg.ServerPort); err != nil {
+		log.Fatalf("Failed to start server: %v", err)
+	}
+}