fix: export __unsafePrisma from prisma mock for tests

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: brendan-kellam

packages/web/src/__mocks__/prisma.ts

@@ -8,6 +8,7 @@ beforeEach(() => {
 });
 
 export const prisma = mockDeep<PrismaClient>();
+export const __unsafePrisma = prisma;
 
 export const MOCK_ORG: Org = {
     id: SINGLE_TENANT_ORG_ID,