Align CI and requires-python with Home Assistant (3.13, 3.14)

- CI: test on Python 3.13 and 3.14 only (matches HA's ALL_PYTHON_VERSIONS)
- pyproject.toml: requires-python = ">=3.13" (matches HA's >=3.13.2)
- Upgrade actions: checkout@v4, setup-python@v5
- Regenerate uv.lock for new requires-python

Fixes CI failure: Python 3.9 no longer available on GitHub Actions runners.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: mdz

.github/workflows/ci.yaml

@@ -9,13 +9,13 @@ jobs:
   build:
     strategy:
       matrix:
-        python-version: [3.9, 3.11, 3.12, 3.13]
+        python-version: [3.13, 3.14]
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install uv

pyproject.toml

@@ -4,7 +4,7 @@ dynamic = ["version"]
 description = "API to query and control hot tubs using the SmartTub system"
 readme = "README.md"
 license = {text = "MIT"}
-requires-python = ">=3.9"
+requires-python = ">=3.13"
 dependencies = [
     "aiohttp>=3.9.1",
     "inflection~=0.5.1",