Converted CLI tests to use vitest#1012

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BobDickinson wants to merge 6 commits intomodelcontextprotocol:mainfrom

BobDickinson:convert-tests-to-vitest

Commits on Jan 14, 2026

Pinned server-everything, fixed all tests to work with current pinned version, fixed problem with undetected failures (isError: true payloads).
BobDickinson
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