Master merge

Master update

…ends

New Rust-based daemon that manages OctoBot instances as a system service.

Core features:
- REST API (TCP + Unix socket) for instance lifecycle management
- Binary, Python, and Docker runtime backends
- SSE streaming for start/restart/update progress
- JWT-based token auth with scopes and audit logging
- launchd/systemd/Windows service integration
- Auto-update via signed manifest

Binary backend:
- HTTP probe loop (60s timeout) waits for OctoBot to actually serve port 5001
- Subprocess cwd pinned to instance data_dir
- stdout/stderr always captured to logs/launcher-stdio.log
- startup_timeout_secs configurable via runtime_options

Service management:
- service stop/restart kill free-running daemons via launcher.pid (not just launchctl)
- spawn_daemon always uses ["service", "run"] args; waits 700ms and tails log on early exit
- Supervisor writes/removes launcher.pid around the serve loop

Instance stop:
- NotRunning treated as success in stop_instance route (idempotent stop)
- Backend::stop takes &InstanceSpec so PID file can be found after daemon restart
- BinaryBackend/PythonBackend: SIGTERM via PID file when in-memory child state is lost

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>