The job has timeout-minutes: 20; the c8 merge across 8 shards takes ~10 min and the
Codecov upload (declared informational) then hung for the rest of the budget on two
consecutive main runs (33207760653, 33215115341) — GitHub cancels the step, the job
ends cancelled, and the run's conclusion turns cancelled although every blocking job
was green. The upload step now has its own 5-minute ceiling and continue-on-error;
the job budget is 30 min. check-workflows suite 32/32; zizmor ratchet unchanged.
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