1.21.0 (2026-04-24) Bug Fixes snmp-discovery: break proto-serialization cycle in Device.PrimaryIp4 (#368) (79f3500), closes #366 Features snmp-discovery: fall back to ifName when ifDescr is empty (#369) (c7e1408) snmp-discovery: refresh FortiGate sysObjectID catalog (#370) (69f65a8) snmp-discovery: set Device.PrimaryIp4 from SNMP target (OBS-1896) (#366) (2c2c01b)