collab: Use `StripeClient` in `POST /billing/subscriptions/sync` endpoint (#31764)
This PR updates the `POST /billing/subscriptions/sync` endpoint to use
the `StripeClient` trait instead of using `stripe::Client` directly.
Release Notes:
- N/A
f9f4be1fc4Marshall Bowers committed on 5/30/2025, 4:37:12 PM· committed by GitHubparenta00b073