fix(mcp): use per-call stdio sessions to fix cross-task cancel-scope error (#3379)#3384

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fancyboi999:fix/3379-mcp-stdio-per-call-session

Commits on Jun 4, 2026

fix(mcp): use per-call stdio sessions to fix cross-task cancel-scope error (#3379)
fancyboi999
committed
test(mcp): restore event loop exception handler in cross-task test
fancyboi999
committed