fix(sessions): ensure database session rollback on commit failure#3766

sivakumar-77 wants to merge 3 commits intogoogle:maingoogle/adk-python:mainfrom

sivakumar-77:fix/db-session-rollback-on-commit-failuresivakumar-77/adk-python:fix/db-session-rollback-on-commit-failureCopy head branch name to clipboard