Switch to Python 3.14, drop support for Python 3.9 (#705)

Author: aobolensk

.github/actions/update-precommit/action.yml

@@ -7,7 +7,7 @@ inputs:
   python-version:
     description: 'Python version to use'
     required: false
-    default: '3.13'
+    default: '3.14'
 
 runs:
   using: composite

.github/workflows/pages.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v6
         with:
-          python-version: '3.13'
+          python-version: '3.14'
       - name: Install Doxygen and Graphviz
         run: |
           sudo apt-get update
@@ -76,7 +76,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v6
         with:
-          python-version: '3.13'
+          python-version: '3.14'
       - name: Install dependencies
         run: |
           python3 -m pip install -r requirements.txt

scoreboard/main.py

@@ -10,15 +10,7 @@
 from jinja2 import Environment, FileSystemLoader
 import logging
 import sys
-
-# Try ZoneInfo from stdlib, then from backports, else fall back to naive time
-try:
-    from zoneinfo import ZoneInfo  # type: ignore
-except Exception:  # pragma: no cover - fallback for Python < 3.9
-    try:
-        from backports.zoneinfo import ZoneInfo  # type: ignore
-    except Exception:  # Last resort: define a stub
-        ZoneInfo = None  # type: ignore
+from zoneinfo import ZoneInfo  # type: ignore
 
 logging.basicConfig(level=logging.INFO, format="%(levelname)s: %(message)s")
 logger = logging.getLogger(__name__)

scoreboard/requirements.txt

@@ -1,3 +1,2 @@
 Jinja2>=3.0
 PyYAML>=6.0
-backports.zoneinfo; python_version < "3.9"