[fakayser]

Release 2.1.1 fixes complete entity description refresh and assigns model and folder IDs centrally in the backend.

Complete refresh adopts changed or removed source descriptions, accepts matching descriptions from multiple sources and rejects conflicts. Sources-only refresh and entities without external sources retain their descriptions.

New model and folder entities receive random JavaScript-safe numeric IDs from one allocator across create, clone, source import, migration and implicit folders. Existing valid IDs survive updates and moves; loading and saving reject invalid IDs and duplicates within each entity type while preserving historical overlap between model and folder IDs. Clients retain the backend's returned IDs and use the existing create/save flow.

PR #54 is merged into this release branch, which also includes current main. Package and lockfile are at 2.1.1; the solution schema remains 2.0.0. Release notes cover both changes and compatibility. The frontend consumer update is oraylis/datam8-frontend#68 and should follow this release PR.

Validation of the integrated release:

• 270 focused backend tests passed, covering source metadata, mappings, Unity Catalog, source navigation, ID allocation, HTTP persistence and migration.
• Ruff, pinned ty, documentation checks and the frozen lockfile check passed.
• PR CI passed with 487 tests, solution validation, package build/install and installed-wheel API/offline ODCS smoke checks.

After merging into main, the protected v2.1.1 tag on the merged commit can run the existing release workflow. No version tag or release has been created by this change.