Canvas Notebook 2026.9.2.3

Highlights

• Hardened PostgreSQL production runtime and SQLite-to-PostgreSQL migration/collaboration durability.
• Added rollback-safe workspace file operations, collaboration repositories, lock/lineage handling, and expanded compatibility coverage.
• Improved reproducible npm installation and third-party compliance artifacts.

Verification

• npm run verify:release
• Tag-triggered multi-architecture build and release-bundle provenance verification passed.