Add account hierarchy framework with migrations, RLS policies, and UI components

.env.production.example

@@ -44,6 +44,12 @@ ADDITIONAL_REDIRECT_URLS=
 # --- Webhooks ---
 DB_WEBHOOK_SECRET=your-webhook-secret
 
+# --- Monitoring (Sentry) ---
+NEXT_PUBLIC_MONITORING_PROVIDER=sentry
+NEXT_PUBLIC_SENTRY_DSN=https://your-dsn@o123456.ingest.sentry.io/123456
+# NEXT_PUBLIC_SENTRY_ENVIRONMENT=production
+# SENTRY_AUTH_TOKEN=your-auth-token-for-source-maps
+
 # --- Feature Flags ---
 # All default to true, set to false to disable
 # NEXT_PUBLIC_ENABLE_MODULE_BUILDER=true