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39 endpoints (24 V1.5 + 2 V1.6 writes + 3 V1.7 writes + 4 V1.8 reads + 4 V1.10 + 2 V1.12). V1.11 adds leadId/saleId filters on leads, 6 vehicle/product fields on leads add/update, %-prefix wildcard on customers/search, and negative invoices (credits). V1.12 adds orders/update (order STATUS write) + orders/get-status-list. All POST. Most require company; customer + lead writes treat it as implicit.