feat(ci): add Python 3.14 to test matrix and pyproject classifiers

Add Python 3.14 to the ci.yml test matrix so CI verifies the package
runs on the latest stable interpreter, and add the corresponding
"Programming Language :: Python :: 3.14" trove classifier so PyPI
metadata accurately reflects supported versions.

`requires-python = ">=3.10"` already covers 3.14, and the ruff
`target-version = "py310"` / mypy `python_version = "3.10"` settings
are floor values so they need no update.

Branch protection on main has also been updated separately to require
the new `Test (Python 3.14)` status check.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: MarTrepodi

.github/workflows/ci.yml

@@ -66,7 +66,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
       - uses: actions/checkout@v6
 

pyproject.toml

@@ -17,6 +17,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",
 ]