PostgreSQL / Supabase Adversarial Data Integrity Review

I’m getting close to putting real beta users on a system I’ve been building with PostgreSQL, Supabase and Node workers. Before I do that, I want an experienced engineer who had nothing to do with building it to come in and try to break it. I’m not looking for someone to tell me the architecture looks good. I’d actually rather you find something we missed. What worries me most isn’t the system crashing. What worries me is the system continuing to work while quietly recording something that isn’t true. The system has workers, scheduled jobs, external evidence, tracking records, outcomes, evidence receipts and derived records. I want the database and finalization path attacked for concurrency problems, retries and idempotency failures, transaction issues, broken constraints, RLS or permission problems, and incorrect evidence provenance. The main question is simple: Can you find a way for the system to confidently record something false, contradictory or unsupported? I want to start with a 4 hour paid adversarial review. I’ll provide a prepared technical handoff and safe test environment so you can spend the time investigating instead of figuring out the basics. No production changes during the initial review. Anything destructive stays in the approved test environment. At the end I want to know what you tested, what you broke, how serious it is, what needs fixing before beta, what can wait, and what you didn’t have time to test. I’m completely fine if four hours isn’t enough for everything. If you only had four hours, where would you attack first and why? If the first review is strong, I’m open to additional work for deeper testing, fixes and retesting.