Add a daily prune event

.github/workflows/daily_prune.yaml

@@ -0,0 +1,39 @@
+name: Daily Prune
+
+on:
+  schedule:
+    - cron: '0 0 * * *' # Executes the script every day at 00:00 UTC
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip3 install ruamel.yaml
+
+    - name: Run Python script
+      run: python scripts/clean_events.py
+
+    - name: Commit changes
+      run: |
+        git config --local user.email "[email protected]"
+        git config --local user.name "GitHub Action"
+        git add -A
+        git diff-index --quiet HEAD || (git commit -a -m "Update event files")
+
+    - name: Push changes
+      uses: ad-m/github-push-action@master
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}