Deduplicate status and hook helpers

[snbafana]

Summary

• move app status metadata builders into the existing runtime status owner
• add a snapshot-only menu-bar cache reader and use it from CLI/daemon fallbacks
• move hook try/catch behavior behind the existing hook owner and add narrow helper tests

Dedup decision

Rechecked the status/helper owners before editing. src/runtime/status.ts already owns daemon status snapshots, src/runtime/menu-bar-status-cache.ts owns cache reads/writes, and src/runtime/hooks.ts owns hook emission. This PR only moves duplicate helper bodies into those owners; it does not redesign status snapshots or merge CLI/daemon/native models.

Verification

• rg for removed local helper names
• pnpm typecheck
• pnpm check:biome
• pnpm test src/runtime/menu-bar-status-cache.test.ts src/runtime/hooks.test.ts src/runtime/daemon/server.test.ts src/runtime/doctor-status.test.ts src/runtime/onboarding.test.ts
• commit hook: pnpm check:app-quality
• pre-push hook: pnpm check:ci-local