Stellar Index v0.5.0-rc.112

[v0.5.0-rc.112] — 2026-06-18

Fixed

• /v1/contracts + /v1/contracts/{id}/interactions 500'd against real
  ClickHouse — count() returns UInt64 but the directory/interaction
  readers scanned into int64 (the stub-backed unit tests didn't catch the
  driver-level type mismatch). Cast with toInt64(count()).