Stellar Index v0.6.2

[v0.6.2] — 2026-07-02

Changed

• /v1/operations directory first page is now short-TTL cached (3s). The
  network-wide directory page is identical for every caller between ledgers but
  costs a ~300ms multi-column DESC-LIMIT read over the lake + a 24h op-type
  aggregation; a small per-limit in-process cache makes it effectively free
  once traffic is concurrent, at most ~one ledger stale. Cursor (paged) requests
  are unaffected. Follows the v0.6.1 summary-shape change.