fix: harden drift verifier and validation flow

__mocks__/lib/database/trades.ts

@@ -0,0 +1,14 @@
+import { jest } from '@jest/globals'
+
+export const mockPrismaClient = {
+  trade: {
+    findUnique: jest.fn(),
+    findMany: jest.fn(),
+    findFirst: jest.fn(),
+    update: jest.fn(),
+  },
+}
+
+export const getPrismaClient = jest.fn(() => mockPrismaClient)
+
+export default { getPrismaClient }