Use native Firstrade strategy adapter

[Pigbibi]

Summary

• switch FirstradePlatform to first-class us-equity-strategies platform_id=firstrade
• remove temporary LongBridge/Schwab adapter-source bridge metadata
• update dependency pins to the merged UsEquityStrategies and QuantPlatformKit commits
• add registry tests for native Firstrade adapter behavior

Tests

• .venv/bin/python -m pytest -q
• PYTHONPATH=/home/ubuntu/Projects/QuantPlatformKit/src:/home/ubuntu/Projects/UsEquityStrategies/src:. .venv/bin/python scripts/print_strategy_profile_status.py