Enqueue a job for asynchronous execution by the worker. Returns the created job (status 'queued'). Valid type values are the registered handlers: echo, wait, hash, fibonacci, fail. The job runs in an isolated process under a timeout, with automatic retries.

Fetch a single job by id, including its status, result, and artifact path.

List recent jobs (newest first), optionally filtered by status.

Cancel a job that is still queued. Running or already-finished jobs cannot be cancelled and return a NOT_CANCELLABLE error.

Return queue health: job counts by status, total, age of the oldest queued job, and the active configuration. No sensitive data.