Bounded telemetry emitted after successful live engine transitions.
Job transitions use [:tay, :job, :transition] with %{count: 1} and
metadata keys :engine, :operation, :state, :previous_state, :queue,
and :job_id. Group commits use [:tay, :storage, :group_commit] with native
time-unit measurements :batch_size, :wait_time, and :fsync_duration.
Queue controls use [:tay, :queue, :control] with %{count: 1}
and :engine, :operation, and :queue metadata. Arguments, diagnostics,
definitions, revisions, PIDs, and storage paths are never included.