0a25a0ef66
The `[WHATSAPP_MANUAL_TRANSFER] success` log introduced in #14975 to track embedded signup → manual migrations was firing on any WhatsApp credential change — including routine `api_key` rotations on inboxes that were already manually configured — inflating the migration count. The log now fires only for the actual migration, and uses a new tag so log searches don't match the older over-counted entries. ## How to reproduce 1. On a manually configured WhatsApp Cloud inbox, update the API key from inbox settings → Configuration. 2. Before this change, the app log records a `[WHATSAPP_MANUAL_TRANSFER] success` line even though no migration happened; after this change it stays silent. 3. Switching an embedded signup inbox to manual setup still logs the migration (now as `[WHATSAPP_EMBEDDED_TO_MANUAL] success`). ## What changed - `Channel::Whatsapp#log_credentials_transfer` now keys off the migration's unique signal — `provider_config['source']` changing from `embedded_signup` to absent — instead of diffing credential keys. - Renamed the log tag from `WHATSAPP_MANUAL_TRANSFER` to `WHATSAPP_EMBEDDED_TO_MANUAL` (success and failure lines) so the corrected entries are searchable without matching pre-fix false positives. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Muhsin <12408980+muhsin-k@users.noreply.github.com>