SNMP MIB walk and traps support for coherent ZR optics

Use SNMP MIB walk and traps to efficiently monitor and manage coherent ZR optics, including 100ZR, 400ZR, 400ZR-M, and 400ZR-M-HP. Use this feature to retrieve OID information sequentially and receive notifications when alarms are triggered or cleared. This enhancement extends SNMP MIB walks to include new digital optical monitoring (DOM) fields and implements SNMP traps for critical alarms.