Relative tolerance of the objective-bound rules of Outcome::check:
two objective values a and b agree, and a dual bound may lie beyond
the primal bound, by at most BOUND_TOLERANCE * max(1, |a|, |b|). Workers
with tighter tolerances decide more strictly on their own and keep a
rejected value in details.
The manifest of an attempt whose journal cannot be replayed (a corrupt or
invalid record before its final line). No record is trusted, so there are
no results and no work totals; runner.journal_error says why.