System updates

✨ New Features
🔐 Signup Form Privacy Links
The registration form now uses the agency-specific Privacy Policy URL from Agency Information settings instead of the default link. An additional required consent checkbox for personal data processing has been added for applicable agencies.
🐛 Bug Fixes
💳 Payment via Invoice Failure
Resolved an issue where payments could not be completed from the dashboard for some customers, requiring manual initiation from Stripe. The invoice payment flow now works correctly end-to-end.