Independent Code and Security Review for Web App

Independent code and security review for a small web app (PHP, JavaScript, Supabase, Stripe). It is a toolbox for Australian trade businesses, built in-house with AI coding help. No one else has reviewed the code, and my insurer needs an independent review before they will cover me. What I need: - Review of the code files for security problems, risky code and quality - Check of the database tables and access rules (Supabase row level security), so one business cannot see another's data - A written report with a plain summary I can give my insurance broker, each problem rated Critical, High, Medium or Low, with how to fix it - A recheck after I fix problems, and a signed letter saying what was reviewed and when You will not need a login to my web hosting or database, my private keys or any customer data. I will send a copy of the code files and a database export. You must sign a Non-Disclosure Agreement before I share any code. In your reply please tell me your fixed price (including GST if it applies) and how many days it will take from start to report. Also tell me your qualifications, similar reviews you have done, and confirm you hold professional indemnity insurance.