ci: update all GitHub Actions to latest versions

- Update actions/upload-artifact from v3 to v4 (v3 deprecated April 2024)
- Update actions/setup-python from v4 to v5 (latest version)
- Add Python 3.12 and 3.13 to CI test matrix
- Ensure compatibility with latest Python versions and GitHub Actions

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
           submodules: recursive
       
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       
@@ -88,7 +88,7 @@ jobs:
           python -c "import leann_backend_diskann; print('✅ DiskANN backend imported')"
       
       - name: Upload artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: wheels-${{ matrix.os }}-py${{ matrix.python-version }}
           path: packages/*/dist/*.whl

.github/workflows/release-manual.yml

@@ -47,9 +47,9 @@ jobs:
           echo "✅ Version is new"
       
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
-          python-version: '3.11'
+          python-version: '3.13'
       
       - name: Install uv
         run: |