fix: pass through unknown MCP content block types#590

dotuananh0712 wants to merge 2 commits intoanthropics:mainanthropics/claude-agent-sdk-python:mainfrom

dotuananh0712:fix/574-search-result-droppeddotuananh0712/claude-agent-sdk-python:fix/574-search-result-droppedCopy head branch name to clipboard