f6072b2885
Tenant::requiredLeadsForTomorrow() previously summed raw daily_limit_target of
active projects, overcharging preflight when a tenant shared a call/site signal
with other tenants. Supplier caps the group at max(max(limits), ceil(Σ/3)) and
splits it across all clients on the same signal_identifier, so a single tenant's
real share is typically much smaller than its raw limit.
group_limits = limits of all is_active projects sharing
(signal_type, agnostic signal_identifier/sms_sender+keyword)
group_order = max(max(group_limits), ceil(Σ group_limits / 3))
tenant_share = ceil(group_order × (project_limit / Σ group_limits))
Legacy webhook projects (signal_type=null — no supplier sharing) still count
their full limit (regression-protected by existing 'sums daily_limit_target' test).
Empty groupLimits edge → conservative full-limit fallback (cross-conn race).
3 Pest tests: single project (legacy passthrough), 3-tenant share discriminator
(10→4), legacy webhook regression. Stage 4 §4.4.3.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>