v0.16.2

Patch release. No behavior changes.

Fixed

• MSRV regression: v0.16.1 did not compile on Rust 1.85 despite
  declaring rust-version = "1.85" — src/backtest_bridge.rs used a
  let-chain, stabilized only in Rust 1.88. Rewritten as nested if let.
• examples/itch-replay/download.sh failed on a fresh checkout (resolved
  the data/ path by cd-ing into it before creating it).

Changed

• Repository moved to the BoringQuantSystems organization; all
  repository/homepage metadata and links updated.
• CI: GitHub Actions pinned to commit SHAs, Dependabot enabled for
  actions, ocaml/setup-ocaml bumped to v3, uv smoke jobs create a venv
  before installing dependencies.