MigrationRequirements backfills missing client_traffics rows from each inbound's settings.clients, but the later MultiDomain->ExternalProxy detection query used SQLite-only json_extract and executed via .Scan. On PostgreSQL it errored, rolling back the whole transaction including the backfill, so clients had no traffic rows: client traffic was never recorded, clients showed offline, and the inbound list showed 0 clients until each inbound was edited and saved.
Make the detection query dialect-aware (NULLIF(stream_settings,'')::jsonb #>> / #>) so the function runs to completion and commits on both dialects.
