Bump QuantPlatformKit dependency

[Pigbibi]

Summary

• update the QuantPlatformKit git dependency to the merged small-account compatibility commit
• unblock downstream resolver conflicts in SnapshotPipelines and LongBridgePlatform

Tests

• python - <<'PY'
  from pathlib import Path
  import tomllib
  p = Path('pyproject.toml')
  data = tomllib.loads(p.read_text())
  for dep in data['project']['dependencies']:
  if dep.startswith('quant-platform-kit'):
  print(dep)
  PY