W019: Leave organization

Removes the caller's own membership from the current org. If the caller is the last owner, the org is closed (purged).

Steps

1. Verify membership. Load the caller's organization_users row for the org; 404 if absent.
2. Last owner closes the org. If the caller is an owner and the only active owner, cascade-purge the organization (all tenant data, memberships, and the org row) and return { deletedOrg: true }.
3. Otherwise remove the membership. Delete the caller's organization_users row and return { deletedOrg: false }.

Returns

{ deletedOrg } — true when the org was purged because the caller was the last owner.

Business rules

• Self-service. A member leaves without needing an admin to remove them.
• Last owner closes the org. Rather than orphaning an owner-less org, the last owner leaving deletes it (consistent with account deletion).

Errors

• NotFoundError. Caller is not a member of this org.