Add cache

Author: psomhorst

.github/actions/install_eitprocessing_uv/action.yml

@@ -40,6 +40,8 @@ runs:
         path: /eitprocessing/.
     - name: Install uv and set the python version
       uses: astral-sh/setup-uv@v6
+      with:
+        cache: true
     - name: Install the project
       run: uv sync --locked ${{ inputs.dependencies }}