Rates Engine v0.5.0-rc.66

[v0.5.0-rc.66] — 2026-05-21

Fixed

• defindex VaultEvent silently dropped by pipeline sink (#49 follow-up).
  rc.65 shipped the Phase-B decoder that matches DeFindexVault topic
  events and produces defindex.VaultEvent consumer events — but
  the pipeline's persistEvent type-switch only had a case for
  defindex.Event (strategy layer) and not defindex.VaultEvent.
  Vault events flowed all the way through Matches+Decode, then fell
  into the unhandled-default branch and were dropped with a
  ratesengine_source_insert_errors_total{kind="unhandled",source="defindex"}
  metric bump. (Caught when 246 strategy flow log lines appeared
  but zero vault flow lines — the metric counter was the smoking
  gun.) Added the missing case: counter bump + INFO log
  "defindex vault flow" with user, multi-asset amounts, and
  df_tokens delta, identical in shape to the per-package Sink
  defined in internal/sources/defindex/consumer.go. This is the
  outer-router gap any new event TYPE (vs new source) will hit —
  worth a future pass to make the dispatcher Sink interface
  do the routing instead of a hand-curated type-switch.