Fix shared package pins after SOXL overlay rollout

[Pigbibi]

Summary

• fix the LongBridgePlatform shared package pins after the SOXL overlay rollout
• point QuantPlatformKit and UsEquityStrategies to the merged commits that Cloud Build can resolve cleanly

Testing

• python3 -m venv /tmp/lbbuildvenv && /tmp/lbbuildvenv/bin/pip install -r requirements.txt