Reproduces 37 duplicate deals observed on prod 2026-05-25 for tenant client1.
After Spec B Phase 1 (commit ccfecd5e) removed DuplicateDetector, the race
between CsvReconcileJob (creates SupplierLead vid=null) and later webhook
retry (vid=int) results in two separate Deals because supplier_lead_deliveries
locks on supplier_lead_id (which differs between csv-recovery and webhook),
not on (phone, project_id).
Failing now — implementation comes in next commit.
Дмитрий