Peer recovery burned its whole retry budget while signaling was down, then
dropped the tracker with no re-arm, so a peer stayed dead until an unrelated
roster event healed it. Recovery now waits for a usable transport before
spending an attempt.
Initiator election also compared a home actor id against foreign roster ids,
which is not antisymmetric across signal servers - both sides offered, or
neither did. Election moves into `peer-role.rules` and compares ids only
within one signal server's identity space.
