test/hil: make main() readable and stop the suite sleeping (#3848)HEADmaster

Three readability changes with no behaviour change on the healthy path —
every pre-existing test passes untouched.

main() was 368 lines with try/finally three deep, its two abort paths
near-identical 40-line blocks; _abort_report holds that shape once, and the
controller-hint cache and pool construction move to their own helpers.
368 -> 279, test_board 180 -> 151, test_device_usbtest 164 -> 125.

test_hil_bounded.py cost 78s on every commit under test/hil/, mostly one 3s
post-flash settle paid by ten tests against a fake rig. Now 37s.

Fixes two pre-existing defects the extraction exposed: _write_failed_spec was
unguarded inside the abort path, so an OSError there replaced the caller's
RuntimeError and no report was written at all; _save_controller_hints overlaid
a startup snapshot onto the re-read cache, clobbering a concurrent job's newer
values. Also five comments that stated the opposite of the code, and both table
renderers measuring width with len() against two-column status marks.

0 files changed, 0 insertions, 0 deletions