Hardened legacy API proxy transport

Legacy API proxy mode now retries transient transport errors before falling back to cached responses.

The legacy API proxy transport now retries transient errors with bounded backoff before falling back to cached responses, smoothing migration from the legacy host without dropping requests.

proxylegacytransport

Commitsa1f456b

Related changes

2026-04-10AddedAPI

Legacy API proxy mode

Opt-in legacy API proxy mode for safer migration off the previous host.

2026-04-10ChangedAPI

Bounded legacy auth fallback cache

Legacy auth fallback now caches negative results to avoid hammering the upstream identity provider.

2026-04-11ChangedAPI

Bounded public facility and decision write latency

Public facility and decision writes are now bounded with a structured timeout fallback.