Adds automated handling of inactive issues/PRs (dry-run)

.github/workflows/maintenance.yml

@@ -0,0 +1,41 @@
+name: Perform automated repository maintenance
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 */2 * * *"
+
+jobs:
+  cleanup-inactive:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    env:
+      inactive_days: 90
+      closing_days: 10
+      total_days: 100
+      inactive_label: "no-activity"
+      closed_label: "auto-closed"
+    steps:
+      - name: Cleanup inactive issues/PRs
+      - uses: actions/stale@v9
+        with:
+          days-before-stale: ${{ env.inactive_days }}
+          days-before-close: ${{ env.close_days }}
+          stale-issue-label: ${{ env.inactive_label }}
+          close-issue-label: ${{ env.closed_label }}
+          exempt-issue-labels: "needs-review,planned,in-progress"
+          stale-issue-message: "Hi there! Unfortunately, this Issue has not seen any activity for at least ${{ env.inactive_days }} days. If the Issue is still relevant to the [latest version of Zappa](https://github.com/zappa/Zappa/releases/latest), please comment within the next ${{ env.closing_days }} days if you wish to keep it open. Otherwise, it will be automatically closed."
+          close-issue-message: "Hi there! Unfortunately, this Issue was automatically closed as it had not seen any activity in at least ${{ env.total_days }} days. If the Issue is still relevant to the [latest version of Zappa](https://github.com/zappa/Zappa/releases/latest), please [open a new Issue](https://github.com/zappa/Zappa/issues/new)."
+          stale-pr-label: ${{ env.inactive_label }}
+          close-pr-label: ${{ env.closed_label }}
+          exempt-pr-labels: "needs-review"
+          stale-pr-message: "Hi there! Unfortunately, this PR has not seen any activity for at least ${{ env.inactive_days }} days. If the PR is still relevant to the [latest version of Zappa](https://github.com/zappa/Zappa/releases/latest), please comment within the next ${{ env.closing_days }} days if you wish to keep it open. Otherwise, it will be automatically closed."
+          close-pr-message: "Hi there! Unfortunately, this PR was automatically closed as it had not seen any activity in at least ${{ env.total_days }} days. If the PR is still relevant to the [latest version of Zappa](https://github.com/zappa/Zappa/releases/latest), please [open a new PR](https://github.com/zappa/Zappa/compare)."
+          labels-to-add-when-unstale: "needs-review"
+          ascending: true
+          enable-statistics: true
+          # DEBUG OPTIONS
+          debug-only: true
+          operations-per-run: 1000