Create and manage maintenance windows in PagerDuty to suppress alerts during planned work

Steps

1. Create a maintenance window: POST /maintenance_windows with start_time (ISO 8601), end_time (ISO 8601), a description, and a services array listing the service IDs to suppress during the window
2. List active maintenance windows: GET /maintenance_windows?filter=ongoing to retrieve currently active windows and their associated services
3. Update a window's end time: PUT /maintenance_windows/{id} to extend or shorten an active maintenance window without deleting and recreating it
4. Delete a maintenance window: DELETE /maintenance_windows/{id} to end suppression immediately if work completes early
5. Create recurring maintenance windows: the PagerDuty API does not natively support recurring windows — implement a scheduler (cron job, Terraform scheduled run, or GitHub Actions schedule) to create windows ahead of each planned maintenance slot
6. Verify suppression is active: POST a test alert to the affected service's Events API endpoint during the window and confirm no incident or notification is generated