ci: fix Python version mismatch and add Python 3.14 to matrix

.github/workflows/ci-tests.yaml

@@ -22,7 +22,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ["3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     runs-on: ${{ matrix.os }}
     # Hard cap per matrix job — bail out fast on real hangs instead of
@@ -38,21 +38,31 @@ jobs:
         run: git config --system core.longpaths true
 
       - name: Install poetry
-        run: pipx install poetry==2.1.3
+        run: pipx install poetry==2.4.1
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6
         with:
           cache: "poetry"
           python-version: ${{ matrix.python-version }}
-          cache-dependency-path: "pyproject.toml"
+          cache-dependency-path: "poetry.lock"
 
       - name: Install invoke
         run: pipx install invoke
 
       - name: Install Dependencies
         run: invoke install
 
+      - name: Verify Poetry Python version
+        run: |
+          poetry run python -c "
+          import sys
+          expected = tuple(map(int, '${{ matrix.python-version }}'.split('.')))
+          actual = sys.version_info[:len(expected)]
+          print('Python:', sys.version)
+          assert actual == expected, f'Expected Python {expected}, got {actual}'
+          "
+
       - name: Validate Types
         if: always()
         run: invoke type-check