Add apply --bash script rendering

[ishandhanani]

Summary

• Add srtctl apply -f <config> --bash to render a standalone lifecycle sbatch/bash script without submitting.
• Add a small tested srtctl.render.lifecycle layer plus embedded bash runtime functions for cleanup traps, optional tachometer telemetry, HTTP/worker readiness, and benchmark command execution.
• Split standalone scripts into a generated manual server config plus the original benchmark config: the script starts do_sweep in manual mode, waits for expected workers, then runs srtctl.cli.run_benchmark against the original config.
• Document the command and telemetry controls.

Validation

• bash -n on an emitted srtctl apply --bash script
• uv run pytest tests/test_lifecycle_render.py tests/test_submit_cli.py tests/test_apply_json.py tests/test_apply_mock.py -q
• make check