Rates Engine v0.5.0-rc.72

[v0.5.0-rc.72] — 2026-05-22

Fixed

• /v1/price/batch p99 pinned at the 10s ceiling (#64).
  lookupPriceBatch resolved its asset_ids in a serial loop —
  up to 100 (GET) / 1000 (POST) — each id a LatestPrice + the
  three-layer price-fallback chain, i.e. one-to-several DB
  round-trips. A 100-id batch serially was ~5–10s, hitting the
  handler deadline. The per-id resolution is now a bounded parallel
  fan-out (priceBatchConcurrency = 16): per-id results land in an
  index-keyed slice so the envelope still preserves first-occurrence
  order, the first validation/internal failure in input order still
  aborts the whole batch, and the per-row freeze lookup moved into
  the parallel work. Race-tested.