Cleanup of the non-blocking findings from the re-review of #6. The tests
were never wrong; only comments that misdescribed the mechanism they
document, and one constant whose name claimed the wrong quantity.
- State the property the walkClock tests rely on (the index load's
Done cost is bounded and independent of record count) instead of the
wrong "three consultations" figure.
- Stop the poolUnwind framing from implying every test is bounded at
two seconds; the three tests that catch their regression only as the
test binary's timeout now say so.
- Record that hashWorker's results-send abandon branch is reachable
from the scan path and is covered by TestScanHashWriteFailureUnwindsPool,
so every cancellation branch has a test.
- Rename walkCancelInFlightDirs to walkCancelInFlightFiles: it is a
file count (same value).
- Note the deliberate departure from the one-test-file-per-source-file
convention at the top of the file.
Model: opus-4-8
sneak