Implemented native startup crash diagnostics for radiald run:
- Added ordered native iroh load, version, bind, and address-discovery phase logs without exposing endpoint secrets.
- Added a standalone, multi-process startup probe with relay mode, timeout, iteration count, and copied persisted-key controls; signal failures are retained per iteration.
- Added phase-order unit coverage and exposed the exact iroh binding version through the leaf transport package.
- Documented safe crash capture, environment details, secret handling, controlled comparisons, and temporary supervisor mitigation.
Checks: pnpm build, pnpm lint, pnpm test, focused daemon private-transport tests, and pnpm --filter @radial/transport-iroh test pass. A one-iteration relay-disabled probe on Linux/arm64 reproduced a native SIGABRT with allocator corruption in iroh; no speculative dependency update or JavaScript retry was added without upstream evidence.