Get job status

**Get Job Status** Retrieves the current status of a queued notification job. **Status Values:** - `pending`: Job is queued and waiting to be processed - `processing`: Job is currently being processed - `completed`: Job completed successfully - `failed`: Job failed and won't be retried - `retrying`: Job failed but will be retried - `expired`: Job expired before processing - `cancelled`: Job was cancelled **Example Response:** ``` { "success": true, "data": { "jobId": "job_1234567890_abc123", "status": "completed", "createdAt": "2024-01-01T12:00:00Z", "updatedAt": "2024-01-01T12:00:05Z", "processedAt": "2024-01-01T12:00:01Z", "completedAt": "2024-01-01T12:00:05Z", "retryCount": 0 } } ```