The SSE (non-async) chapter-names handler streamed results to the client
but never wrote them into the PocketBase job payload — only the initial
{pattern} stub was stored. The Review button then fetched the job and
found no results, showing 'No results found in this job's payload.'
Fix: accumulate allResults across batches (same as the async handler) and
write the full {pattern, slug, results:[...]} payload when marking done.