Require Python 3.10 for uv environment

Author: splasky

README.md

@@ -43,7 +43,7 @@ Feel free to open issues and pull requests on GitHub.
 
 ## Development
 
-This project uses a uv-managed virtual environment by default. The lockfile is tracked so local development and CI use the same dependency resolution.
+This project supports Python 3.10 and newer. It uses a uv-managed virtual environment by default. The lockfile is tracked so local development and CI use the same dependency resolution.
 
 Install the development environment:
 ```bash

pyproject.toml

@@ -7,7 +7,7 @@ name = "python-datastore-sqlalchemy"
 version = "9.0.3"
 description = "SQLAlchemy dialect for google cloud datastore"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = { text = "MIT" }
 authors = [
     { name = "HY Chang(splasky)", email = "hychang.1997.tw@gmail.com" },