This PR starts the second pass of API doc accuracy review (without
changing doc structure).
## Included in this PR
- Add verification progress log for mock-account OAuth2 testing:
- `openapi/audit/mock-account-review-2026-03-01.md`
## What has been verified
- Quote APIs: market temperature, history market temperature, security
list
- Watchlist API: groups
- Asset APIs checked and failure modes captured for current mock-account
scope
## Next commits (same PR)
- Apply field/response corrections in docs (en/zh-CN/zh-HK) based on
verified runtime behavior
- Keep original documentation layout unchanged