One call was deciding too much
Phone-to-Telegram used to be a single MTProto call: import the contact, read back the entity, done. When Telegram returned an unoccupied number that was the whole answer, which is wrong more often than it should be, because an index that captured the number at a different time may still hold the account.
Index first, session second
Now the check tries the external index first when it is configured, then the session, and reports which path produced the hit. Both lanes are labelled in the result so you can tell a session hit from an index hit without guessing.
No new account, no scraping
No new account or scraping. If the index is not configured it is skipped silently and the session path runs exactly as before.
The Inquire desk
Build notes from the console and the lanes behind it. Written when something actually changes, with the numbers attached.
