fix: filter thought parts from A2A client user-facing response#4686

OiPunk wants to merge 2 commits intogoogle:maingoogle/adk-python:mainfrom

OiPunk:codex/adk-python-4676-a2a-thought-filterOiPunk/adk-python:codex/adk-python-4676-a2a-thought-filterCopy head branch name to clipboard