Fix schema: create teams BEFORE profiles (fixes foreign key error), merge admin schema into main

Build all missing features: PDF/DOCX upload, team system (5 seats, invites, shared dashboard), API keys (generate/revoke/limits), custom clause rules (CRUD + regex)

Replace Stripe with Razorpay: subscriptions, webhooks, checkout modal, INR pricing

🛡️ ClauseGuard v1.0 — Full codebase: Extension + Website + API + ML