candidateQuery now blocks a lead whose WhatsApp number is shared by 2+
leads, unless a shared-number override exists. The inner correlated
subquery compares the bare other.whatsapp column (not normalizedSql())
against the outer row's two computed number forms so SQLite can use
idx_leads_whatsapp instead of a full table scan, keeping the 1.3M-row
perf test within budget.
Also updates the pre-existing 'persiste erro temporario e nao repete
equivalente' test: its two leads use 8/9-digit equivalent numbers,
which the new filter now blocks by default, so an override is added
to keep exercising the intended equivalent-number dedup behavior.
Tracks the app that was already in place (capture, treatment, outreach,
WhatsApp integration, server, frontend, tests, docs) so future feature
work can branch and use isolated worktrees.
Gustavo