Webhooks can have either `account` or `connect` as their destination,
but not both. This means events for both cannot be handled in a single
webhook, as each destination requires a different secret. This PR
introduces a separate webhook for `connect` events and adds a new secret
for parsing `connect` events.

<img width="868" alt="Screenshot 2025-02-09 at 8 59 41 PM"
src="https://github.com/user-attachments/assets/ca6390ac-170b-44a4-8ab7-b8935abe2e25"
/>