v0.9.0b2

Beta patch release for the public Sylliptor launch candidate.

Fixed

• Restores and verifies the sandbox image release path for GHCR.
• Publishes refreshed sandbox images for v0.9.0b2.
• Updates release metadata and public-facing support text for the 0.9 beta line.

Artifacts

• PyPI: https://pypi.org/project/sylliptor-agent-cli/0.9.0b2/
• GHCR sandbox image: ghcr.io/alysisai/sylliptor-sandbox