feat(destination-motherduck): Point to CDK dev branch with primary key fix

- Update airbyte-cdk dependency to use dev branch devin/1751064114-fix-primary-key-fallback
- This branch contains the fix for primary key fallback logic in CatalogProvider
- Allows end-to-end testing of the primary key fix with MotherDuck destination
- References CDK PR: airbytehq/airbyte-python-cdk#627

Co-Authored-By: AJ Steers <[email protected]>

Author: devin-ai-integration[bot]