fix: remove extraneous source.description schema property; clarify entity.description covers MCP#3552

Aniruddh25 merged 8 commits into

mainAzure/data-api-builder:mainfrom

copilot/fix-extraneous-source-descriptionAzure/data-api-builder:copilot/fix-extraneous-source-descriptionCopy head branch name to clipboard