feat: mysql 单后端精简分支 — SQLAlchemy 2.0 async + aiomysql + alembic

pyproject.toml

@@ -1,21 +1,17 @@
 [project]
 name = "fastapi-template"
 version = "0.1.0"
-description = "开箱即用的 FastAPI 模板：MySQL(SQLAlchemy2.0 async) / MongoDB(Beanie) 可切换"
+description = "FastAPI 模板（MySQL + SQLAlchemy 2.0 async 单后端分支）"
 requires-python = ">=3.11"
 dependencies = [
     "fastapi>=0.115",
     "uvicorn[standard]>=0.30",
     "pydantic>=2.7",
     "pydantic-settings>=2.4",
-    # MySQL backend
     "sqlalchemy[asyncio]>=2.0",
     "aiomysql>=0.2.0",
     "alembic>=1.13",
-    # MongoDB backend
-    "beanie>=2.0",
-    "pymongo>=4.9",
-    "cryptography>=50.0.0",
+    "cryptography>=43",  # aiomysql 连 MySQL8 认证需要
 ]
 
 [dependency-groups]