Increase IBKR API handshake timeout

[Pigbibi]

Summary

• make IBKR API connect timeout configurable with a 60s default
• pass the timeout through to QuantPlatformKit connect_ib
• document the runtime env var and cover default/override behavior in tests

Validation

• PYTHONPATH=.:../UsEquityStrategies/src:../QuantPlatformKit/src .venv/bin/python -m pytest -q
• git diff --check