Stellar Index v0.5.0-rc.119

[v0.5.0-rc.119] — 2026-06-18

Fixed

• Account tx/ops participant query no longer full-scans. The rc.118
  Phase-B union used source_account = ? OR (…) IN (subquery), which defeats
  the source_account skip-index and full-scans the 23 B-row operations table
  (every account, not just whales). Rewritten as a UNION ALL of two
  index-friendly arms — sourced (via the source_account index) and participant
  (matched on the operations PRIMARY KEY (ledger_seq, tx_index, op_index) via
  the account-prefixed operation_participants). r1-timed: the participant arm
  is 0.018s; remaining latency for very-high-activity accounts is the
  pre-existing source_account-ordering cost, unchanged by this feature.