Development record

An announcement on a status branch named by a holder id always shows its sender as claimed: abcd no longer asks the forge who pushed it, because a holder id names no account the forge's record could match. So a later commit on that branch from a different pushing account looks the same as the branch owner's own, where on a branch named by a username the forge's record could mark it doubtful. Nothing acts on the sender check beyond what status, peers and the prompt hook display.