feat(quota): Moonshot Open Platform balance and TPD lock for custom nodes

[HouMinXi]

Summary

Custom OpenAI-compatible nodes aimed at api.moonshot.cn / api.moonshot.ai showed no balance on the dashboard. TPD and empty-wallet 429s also failed to stick, so combo strict-random kept drawing prepaid keys that were already dead for the day.

This change treats those hosts as Moonshot Open Platform: GET /v1/users/me/balance, classify TPD and insufficient-balance 429s as quota, and lock the connection until the node daily-reset clock (IANA timezone + hour) or a Reset header. No clock and no header uses the short 429 cooldown. The TPD ceiling is read from limit: N in the error text.

Test plan

DISABLE_SQLITE_AUTO_BACKUP=true node --import tsx/esm \
  --import ./open-sse/utils/setupPolyfill.ts \
  --import ./tests/_setup/isolateDataDir.ts \
  --test --test-force-exit \
  tests/unit/moonshot-open-platform.test.ts \
  tests/unit/classify429.test.ts \
  tests/unit/daily-quota-reset.test.ts \
  tests/unit/account-fallback-service.test.ts \
  tests/unit/moonshot-quota-fetcher.test.ts \
  tests/unit/provider-quota-visibility.test.ts \
  tests/unit/qoder-usage-quota.test.ts \
  tests/unit/provider-node-daily-reset-schema.test.ts \
  tests/unit/moonshot-quota-writeback.test.ts \
  tests/unit/api-key-self-service.test.ts

135/135 pass on upstream/release/v3.8.51 @ 2a6d45abe. Dropping providerSpecificData from self-service, or forcing USD on .cn, turns the two new tests red.

Notes for reviewers

• Custom node ids are uuids. Quota support is host-based (api.moonshot.cn / api.moonshot.ai), not a static provider-id list.
• Migration 172 adds nullable daily_quota_reset_timezone / daily_quota_reset_hour on provider_nodes. An empty clock is valid.
• File-size ratchet bump is own growth at existing chokepoints. Host predicates, the reset clock, and the fetcher are new files under cap.
• .cn balance is labeled CNY; .ai stays USD.

Not in this PR

• Expanding combo strict-random to one target per key (account pick stays in auth)
• Hardcoding a 1.5M TPD ceiling
• Guessing host midnight when the node clock is empty