Release SpatialCF v0.1.1

[Legender134]

Summary

• publish the reviewed SpatialCF v0.1.1 public source snapshot
• remove the legacy spatialcf.data public surface
• update local-install documentation, package metadata, and public CI

Validation

• public smoke, import closure, docs, and package-build checks pass
• wheel and sdist member policies pass
• no Unity process is started by the release checks