A module mock that leaves out an export the code under test reaches throws
at the call, and where that code catches and logs (a best-effort tail, a
fail-soft read) the test went on green while the path it meant to cover
never ran. The Apple Health import tests mocked the rollup module without
its fold window, so the import tail's rollup fold and cache invalidation
never ran in any of them; four route test files mocked the logging context
or the rollups without what the measurement tail reaches.
Both setup files now watch the console and fail the test in which such a
line was logged. The ECG import test keeps the real rollup module and
stubs only the fold, and the four unit mocks gain what they lacked.
