Two progress tests fire `client.callTool()` without holding the promise so
they can assert on the notifications the call streams while it is still in
flight. `disconnect()` then closes the SDK client, which rejects every
pending request with "Connection closed" — with nothing holding the
promise that lands as an unhandled rejection, which vitest counts as a run
error and fails `npm run ci` at `coverage` even though all tests pass.
Add a `settleInFlight()` helper that attaches the handler at call time (not
after the assertions, which would leave a window the rejection can escape
through) and returns a promise the test awaits after `disconnect()` so
teardown stays ordered. Neither outcome is asserted: the call may
legitimately complete before the teardown or reject with it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HDdo1rNRVQnVRRdsqSrvG3
1881e5c73f