Prevent cancellation of initialize request per MCP spec (#1350) #2233

Job	Run time
build (windows-latest, Release)	14m 20s
build (macos-latest, Release)	7m 0s
build (macos-latest, Debug)	6m 41s
build (ubuntu-latest, Release)	6m 47s
build (windows-latest, Debug)	12m 49s
build (ubuntu-latest, Debug)	6m 48s
publish-coverage / publish-coverage	1m 9s
	55m 34s

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