we wanna have the following endpoints for api v2:

1. https://cal.com/docs/api-reference/v1/attendees/find-all-attendees
2. https://cal.com/docs/api-reference/v1/attendees/find-an-attendee

think we can reuse the existing logic that v2 has, this shouldn't require any extra logic

Note: we need to make sure we add more aggressive rate limiting on these endpoints. the attendees table is super massive so anyone starts spamming this and we'll be in trouble