Rates Engine v0.5.0-rc.29

[v0.5.0-rc.29] — 2026-05-08

Added

• Auto-register classic_assets + issuers from observed
  trades — the Phase 4 observer migration 0023 planned for
  but never built. Store.InsertTrade now upserts a
  classic_assets row (and a matching issuers row) for both
  classic-asset legs of every trade, with last_seen_* and
  observation_count bumped on conflict. A process-lifetime
  sync.Map dedupes so we hit the DB once per unique asset
  per process. Errors soft-fail so a registry-side problem
  can't sink the trade-insert hot path. Net effect on prod:
  /v1/issuers populates with every G-strkey ever seen as an
  issuer of a traded classic asset, and /v1/coins stops
  surfacing only the hand-curated subset. Slug stays NULL on
  insert (the existing COALESCE(slug, code) lookup makes
  that safe + avoids unique-constraint conflicts when two
  issuers share the same code).

Changed

• Classic-asset labels show the issuer's organisation when
  known. AssetLabel renders USDC / by Circle instead of the
  truncated G-strkey when /v1/issuers returns a populated
  org_name. Powered by a new useIssuerLookup hook that pulls
  /v1/issuers?limit=500 once per session and indexes by
  G-strkey. Falls back to the truncated G-strkey for unknown
  issuers.
• Comet rows annotated as "Blend backstop" on /dexes. The
  only Comet pool deployed on Stellar mainnet is Blend's
  backstop module (per docs/operations/wasm-audits/comet.md),
  so its trades are liquidation-auction artefacts not retail
  price discovery. The new chip-subscript surfaces that context
  inline so visitors don't read the row as a normal AMM venue.