The unit block now feeds blind_sweep_warning a sampled reason and asserts
the new lead plus two must-fail guards: the disproven 'grant checks: read
and statuses: read' diagnosis stated as fact goes red, and so does any
drift in the counted line's whole-line shape (exactly the blind PRs match,
no more, no less — a reason line that matched would double-count, a folded
reason would undercount). read_failure_reason is covered pure: D4 wording
for empty stderr, multi-line collapse to one line, 400 chars truncated to
300 plus ellipsis within the 304-byte bound, 300 passing through whole.
blind_main_probe's gh pr view stub now fails with a denial on stderr, the
way real gh fails.
Part of #101.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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