chore: Optimize GitHub Actions workflows (#10)

Author: michaelmoore-s1

.github/actions/setup-python-uv/action.yml

@@ -0,0 +1,28 @@
+name: Setup Python with uv
+description: Install uv and cache dependencies
+inputs:
+  python-version:
+    description: Python version to use (optional, for matrix builds)
+    required: false
+    default: ''
+runs:
+  using: composite
+  steps:
+    - name: Install uv
+      uses: astral-sh/setup-uv@v7
+
+    - name: Cache uv dependencies
+      uses: actions/cache@v4
+      with:
+        path: |
+          ~/.cache/uv
+          .venv
+        key: uv-${{ runner.os }}-${{ inputs.python-version || 'default' }}-${{ hashFiles('**/pyproject.toml', '**/uv.lock') }}
+        restore-keys: |
+          uv-${{ runner.os }}-${{ inputs.python-version || 'default' }}-
+          uv-${{ runner.os }}-
+
+    - name: Install Python (uv-managed)
+      if: ${{ inputs.python-version != '' }}
+      shell: bash
+      run: uv python install ${{ inputs.python-version }}