Deleted platform-specific buildUniqueKey($project, $platform). It diverged for
SMS (B2='sender+keyword', B3='sender' alone) → orphan supplier_projects on
sharing rebalance — B2 and B3 rows for the same project couldn't be reconciled
as one group. Now ALL platforms use buildUniqueKeyAgnostic:
site/call → signal_identifier
sms+keyword → sender+keyword
sms (no kw) → sender
3 callers updated: SyncSupplierProjectJob (online + batch paths) and
SupplierProjectImporter. Pest +1 test on Importer SMS commit asserts uniform
unique_key=sender+keyword across B2+B3 (RED before fix, GREEN after).
Full Importer suite 15/15 GREEN, SyncSupplierProjectsJob 12/12 GREEN.
Stage 4 §4.4.1.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Дмитрий
4b7b67cefa