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>

.gitignore

@@ -0,0 +1,31 @@
+# 二进制文件
+bin/
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# 测试覆盖
+*.out
+coverage.html
+
+# 依赖目录
+vendor/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# 环境变量
+.env
+.env.local
+
+# macOS
+.DS_Store
+
+# Docker
+*.log