Get all maintenance rules
[ { "id": 123, "name": "<string>", "description": "<string>", "created_by": "<string>", "cel_query": "<string>", "start_time": "2023-11-07T05:31:56Z", "end_time": "2023-11-07T05:31:56Z", "duration_seconds": 123, "updated_at": "2023-11-07T05:31:56Z", "suppress": false, "enabled": true } ]