Re-review of afa350d found that the correlated-subquery rewrite in
listLeads regressed any page landing in a large sort-tie block (e.g. the
default prioridade:asc sort's prioridade=4/score=0 bucket): SQLite's block
sort materializes the whole tied group before LIMIT/OFFSET apply, so the
shared-number subqueries got evaluated for the entire block instead of just
the page (measured 8-9x slower on page 2+ of a 60k-row fixture).
Split listLeads into two queries: a cheap id-only pass that does the
sorting/pagination (same cost as before the shared-number feature existed),
then a hydrate pass scoped to WHERE leads.id IN (...) for just that page's
ids, which is where the shared-number subqueries now run. getLead was
already a single-id lookup and didn't need this.
Also fixed the accompanying test, which only checked page 1 (a small,
already-sorted block) and so couldn't have caught the regression it was
meant to guard against; it now also checks a page landing inside the large
tied block.
Gustavo
240c70b715