Copilot review round 2 on #2272: a jq failure on an unexpected shape leaves n
empty, `[ "" -ge 1 ]` then exits non-zero, break never fires, and the loop
sleeps and retries forever — the same unbounded wait as the awk pipe, reached
from the other end. Verified locally: jq exits 5 and the test exits 1.
Propagate the jq failure, guard that n is numeric, and generalize the prose to
say every step which can fail exits rather than retries.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017nLLLTGc37hQiC8s3mNyhq
Signed-off-by: cliffhall <cliff@futurescale.com>
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