connectionIdentity
Fresh-handshake identity for the current connection session. Null when no handshake identity has been confirmed for the active transport. Cleared synchronously before a new address is published, and populated atomically when handleMyInfo captures the selected address and decodes nodeNum and deviceId from the same MyNodeInfo packet. Generation-boundary cleanup atomically preserves an identity already published for the new session. Never populated by loadCachedNodeDB or reactive DB cache emissions.