chore: cache uv .venv in cicd

.gitea/workflows/add-new-service.yml

@@ -21,7 +21,7 @@ jobs:
         uses: astral-sh/setup-uv@v5
         with:
           version: "latest"
-          enable-cache: true # Speeds up runs by caching python dependencies
+          enable-cache: true # Speeds up runs by caching python dependencies  # TODO: does this work?
 
       - name: Parse Service Directory Name
         id: parse_branch