When all accounts are rate-limited or token-exhausted, the retry loop
was incorrectly counting the wait time as a failed attempt. This caused
premature "Max retries exceeded" errors when we were just patiently
waiting for accounts to become available.
- Add attempt-- after sleeping for rate limits or strategy waits
- Add #diagnoseNoCandidates() to hybrid strategy for better logging
- Add getTimeUntilNextToken() and getMinTimeUntilToken() to token tracker
- Return waitMs from hybrid strategy when all accounts are token-blocked
Co-Authored-By: Claude <noreply@anthropic.com>