v6.1.1

Minor Compatibility and Stability Release

This release carries retry-path hardening for non-5xx upstream failures plus the release metadata required to publish the patch cleanly. Read the summary below before upgrading or publishing.

• Retries structured service_unavailable_error and server_is_overloaded payloads as server faults instead of misclassifying them as rate limits.
• Preserves overload retry_after backoff when the account pool is exhausted, including single-account configurations.
• Retries live upstream server_error payloads on non-5xx responses.
• Stabilizes merged retry regression coverage and publishes the resulting patch as 6.1.1.

Commit Summary

• 536bc49 chore(release): prepare v6.1.1
• c151a21 test(retry): reset module state between server retry regression cases
• 512a4da Merge branch pr-139-open into release/pr137-pr139
• 2fafba6 Merge branch pr-137-open into release/pr137-pr139

Thank you to 1 community contributor:

• @sdip15fa:
  • original structured overload retry lane merged through #137