collab: Don't create a Zed Free subscription if one already exists in Stripe (#30983)
This PR adds a check for if a Zed Free subscription already exists in
Stripe before we try to create one.
Release Notes:
- N/A
f73c8e5841Marshall Bowers committed on 5/20/2025, 12:18:45 AM· committed by GitHubparentf7a0834