wboayue / rust-ibapi / 21815621649

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feat: add Min10 (10-minute) bar size for historical data (#392)

* feat: add opt-in TCP_NODELAY via IBAPI_TCP_NODELAY env var

Optionally disables Nagle's algorithm on TcpStream when the environment
variable IBAPI_TCP_NODELAY=1 is set. Default behavior is unchanged
(Nagle enabled, matching upstream).

When enabled, small writes (order submissions ~100-200 bytes) are sent
immediately instead of being buffered up to 40ms. For trading systems
this eliminates latency on order routing with zero practical downside.

Usage:
  IBAPI_TCP_NODELAY=1 ./my-trading-app

Affected paths:
- sync: TcpSocket::new() and TcpSocket::reconnect()
- async: AsyncConnection::connect_with_callback() and reconnect()

* feat: add Min10 (10-minute) bar size support

Adds 10-minute bar size to the BarSize enum for historical data fetching,
matching IBKR TWS/Gateway API support.

Changes:
- Add Min10 variant to BarSize enum (between Min5 and Min15)
- Display format: "10 mins"
- FromStr parsing: "MIN10" → BarSize::Min10
- Update tests to include Min10 coverage

This aligns with the official IBKR API specification which supports
10-minute bars for historical data requests.

* Update async.rs

* Update sync.rs

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Co-authored-by: Wil Boayue <wil@boayue.com>

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