ci: Enable uv caching in GitHub workflows

Add `enable-cache: true` to all uv setup steps across workflows to speed up CI runs by caching downloaded packages and wheels.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: ValerianRey

.github/workflows/build-deploy-docs.yml

@@ -24,6 +24,7 @@ jobs:
         uses: astral-sh/setup-uv@v5
         with:
           python-version: '3.14'
+          enable-cache: true
 
       - uses: ./.github/actions/install-deps
         with:

.github/workflows/release.yml

@@ -20,6 +20,7 @@ jobs:
         uses: astral-sh/setup-uv@v5
         with:
           python-version: '3.14'
+          enable-cache: true
 
       - name: Build
         run: uv build

.github/workflows/tests.yml

@@ -41,6 +41,7 @@ jobs:
         uses: astral-sh/setup-uv@v5
         with:
           python-version: ${{ matrix.python-version || '3.14' }}
+          enable-cache: true
 
       - uses: ./.github/actions/install-deps
         with:
@@ -68,6 +69,7 @@ jobs:
         uses: astral-sh/setup-uv@v5
         with:
           python-version: '3.14'
+          enable-cache: true
 
       - uses: ./.github/actions/install-deps
         with:
@@ -88,6 +90,7 @@ jobs:
         uses: astral-sh/setup-uv@v5
         with:
           python-version: '3.14'
+          enable-cache: true
 
       - uses: ./.github/actions/install-deps
         with: