Fix race in resumption test#14

SoldierSacha merged 1 commit intomainsacha-development-stuff/mcp-python-sdk:mainfrom

codex/fix-notification-assertion-error-in-test_streamablehttp_cliesacha-development-stuff/mcp-python-sdk:codex/fix-notification-assertion-error-in-test_streamablehttp_clieCopy head branch name to clipboard