Stellar Index v0.7.4

[v0.7.4] — 2026-07-03

Fixed

• Catalogue rows actually gained their analytics (v0.7.3 follow-up):
  post-deploy verification showed the twin merge merging nothing — only
  the listing query computes the windowed change columns, and the
  per-asset reader returns them nil. The enrichment now reads the
  listing reader with an exact-id filter; a stub test pins the
  dependency by mimicking production's reader asymmetry.