fix: automatically recover local OMP service

[wolfiesch]

What this changes

• Retry the exact transient launchctl bootstrap error 5 that macOS can return after replacing an older LaunchAgent.
• Repair the default auto-start Local OMP service when its target falls back to Connecting.
• Leave healthy and already-starting services untouched, and deduplicate concurrent repair attempts.

How you verified it

• pnpm check passed.
• pnpm test passed: 1,158 tests, including new failing-first coverage for bootstrap error 5, transient registration failure, healthy-service preservation, and reconnect repair.
• pnpm build:desktop passed.
• Live macOS reproduction replaced a stale development LaunchAgent with the signed bundled v0.1.28 OMP runtime; service health returned OK and the running desktop reconnected.

Checklist

• pnpm check passes (release contract, provenance, lint, typecheck)
• pnpm test passes; new behavior has a test that fails without this change
• Any pasted logs or screenshots are redacted: no secrets, tokens, pairing codes, or private paths
• Ported code (T3 Code / OMP) follows the provenance rules in THIRD_PARTY_NOTICES.md

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