fix(quota): hydrate and persist account quota snapshots

[luvs01]

Motivation

• The runtime declared disk-backed helpers for per-account quota snapshots but never wired them into production reads or successful probe updates, so evidence was lost across restarts and pre-dispatch ranking remained blind.
• Persisting newly measured Anthropic/Kiro per-account quota to disk ensures restart-time ordering uses last-known headroom and avoids wasted rotation retries.
• Add a small integration regression to prove disk→runtime hydration and that ordinary probes schedule a debounced snapshot write.

Description

• Seed the in-memory per-account quota map from the persisted snapshot by calling hydrateAccountQuotaCache() from routing-facing reads and reconciliation points.
• Schedule debounced disk writes by calling persistAccountQuotaCache() after successful Anthropic and Kiro provider-level probes and after successful per-account probes.
• Add a test-only reset helper resetProviderAccountQuotaDiskStateForTests() and update persistence tests to assert that persisted rows hydrate the runtime cache and that production probes schedule writes.
• Make clearAccountQuotaCache() avoid re-seeding from the file just cleared to prevent races with immediate file-backed writes.

Testing

• ✅ Ran focused tests: node_modules/bun/bin/bun.exe test tests/provider-account-quota-persistence.test.ts tests/provider-account-quota.test.ts and observed the added persistence/hydration assertions pass (23 tests).
• ✅ Typecheck succeeded with node_modules/bun/bin/bun.exe run typecheck.
• ✅ Privacy scan succeeded with node_modules/bun/bin/bun.exe run privacy:scan.
• ❌ Full suite attempted (node_modules/bun/bin/bun.exe run test) but encountered unrelated, pre-existing failures in other subsystems (lab automation and a few integration tests); these unrelated failures prevented a completed full-suite run in this environment.

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Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-08-31T01:07:00.245163Z	6087fbe	PR opened

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[luvs01]

상류 dev의 src/providers/quota.ts에 hydrateAccountQuotaCache()/persistAccountQuotaCache()가 정의되어 읽기·쓰기 경로 양쪽에서 호출됩니다. 이 PR이 추가하려던 스냅샷 영속화가 상류 커밋 3e3df05aa(lidge-jun#2880)로 반영되어 가치 소멸.