fix(providers): do not treat a Claude weekly warning as exhaustion

[HouMinXi]

Summary

• OmniRoute treated Anthropic's predictive weekly-usage warning as proof that the Claude account was already exhausted. A Claude Max account at 92 percent used, with the session at 3 percent, was skipped and the caller was told to wait.
• The preflight skip and the real 429 classification shared one predicate. The preflight now skips an account only when the active critical window reports no quota remaining. A later real 429 still classifies from the same active and critical metadata.
• The reset time announced for a skipped Claude account is the window's own reset, not the capped value that turned a weekly reset into "reset after 5m".

Related Issues

• Closes fix(claude): Claude predictive weekly warning is treated as exhausted at 92% usage #15351

Validation

• Change type: other (Claude quota preflight)
• Focused tests: node --import tsx/esm --test tests/unit/claude-scoped-quota-auth.test.ts (15 pass)
• eslint on the changed files, with the repo suppression file
• Reconciled with release/v3.8.52 @ 23a1148486
• Updated test covers the change
• Defect injection: dropping the preflight predicate makes the new assertion fail with true !== false, and the change was restored

Tests Added Or Updated

• tests/unit/claude-scoped-quota-auth.test.ts (updated)

Coverage Notes

• The new case feeds a weekly window at 92 percent used and asserts the account is not skipped, then feeds the same window at 100 percent and asserts it is still blocked.

Reviewer Notes

• isBlockingClaudeQuota is unchanged and still drives the real 429 path. Only isQuotaExhaustedForRequest and the preflight reset use the new predicate.