feat: 更新后端平台模块、数据库、Compute引擎及多项配置文档

- 更新 backend 平台 API、platform_store、session 数据库模块
- 新增 backend SQL 初始化脚本
- 更新 compute 引擎适配器及 README
- 更新 Docker 部署配置（app/compute）
- 更新前端入口、环境类型声明及 README
- 新增 docs/menu-functional-requirements.md 菜单功能需求文档
- 更新多项项目文档

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

backend/pyproject.toml

@@ -2,14 +2,14 @@
 name = "yg-ft-backend"
 version = "0.1.0"
 description = "Backend service for the model fine-tuning platform"
-requires-python = ">=3.11"
+requires-python = ">=3.12"
 dependencies = [
   "fastapi>=0.111.0",
   "uvicorn[standard]>=0.30.0",
   "python-multipart>=0.0.9",
   "pydantic>=2.7.0",
   "sqlalchemy>=2.0.30",
-  "asyncpg>=0.29.0",
+  "psycopg[binary]>=3.2.1",
   "alembic>=1.13.1",
   "redis>=5.0.4",
   "httpx>=0.27.0",
@@ -26,7 +26,7 @@ dev = [
 
 [tool.ruff]
 line-length = 100
-target-version = "py311"
+target-version = "py312"
 
 [tool.pytest.ini_options]
 testpaths = ["tests"]