Add Actions storage cleanup workflow

Author: Birditch

.github/workflows/cleanup-actions-storage.yml

@@ -0,0 +1,33 @@
+name: Cleanup Actions Storage
+
+on:
+  schedule:
+    - cron: "17 3 * * *"
+  workflow_dispatch:
+
+permissions:
+  actions: write
+  contents: read
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Delete artifacts and caches older than 7 days
+        env:
+          GH_TOKEN: ${{ github.token }}
+          REPO: ${{ github.repository }}
+        run: |
+          cutoff=$(date -u -d "7 days ago" +%Y-%m-%dT%H:%M:%SZ)
+
+          gh api "repos/$REPO/actions/artifacts" --paginate \
+            --jq ".artifacts[] | select(.created_at < \"$cutoff\") | .id" |
+          while read -r id; do
+            [ -n "$id" ] && gh api -X DELETE "repos/$REPO/actions/artifacts/$id"
+          done
+
+          gh api "repos/$REPO/actions/caches" --paginate \
+            --jq ".actions_caches[] | select(.last_accessed_at < \"$cutoff\") | .id" |
+          while read -r id; do
+            [ -n "$id" ] && gh api -X DELETE "repos/$REPO/actions/caches/$id"
+          done