- SNMPCredential struct with v1/v2c/v3 field support - ParseRouterOSCredentials handles typed and legacy no-type-field JSON - ParseSNMPCredentials handles snmp_v1, snmp_v2c, snmp_v3 types - credentialEnvelope for type-agnostic type field peeking Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>