Change log for ARISTA_SWITCH

Date	Changes
2025-12-16	Enhancement: - Added a Grok pattern to parse the new pattern of SYSLOG format logs. - event.idm.read_only_udm.metadata.product_event_type: Newly mapped `Message_Code` raw log field to `event.idm.read_only_udm.metadata.product_event_type` UDM field. - event.idm.read_only_udm.target.file.full_path: Newly mapped `config_file` raw log field to `event.idm.read_only_udm.target.file.full_path` UDM field. - event.idm.read_only_udm.target.application: Newly mapped `service` raw log field to `event.idm.read_only_udm.target.application` UDM field. - event.idm.read_only_udm.target.process.command_line: Newly mapped `tty` raw log field to `event.idm.read_only_udm.target.process.command_line` UDM field. - event.idm.read_only_udm.target.resource.name: Newly mapped `authz_action` raw log field to `event.idm.read_only_udm.target.resource.name` UDM field. - event.idm.read_only_udm.target.namespace: Newly mapped `vrf_name` raw log field to `event.idm.read_only_udm.target.namespace` UDM field. - event.idm.read_only_udm.network.asn: Newly mapped `neighbor_as` raw log field to `event.idm.read_only_udm.network.asn` UDM field. - event.idm.read_only_udm.target.ip: Newly mapped `neighbor_ip` raw log field to `event.idm.read_only_udm.target.ip` UDM field. - event.idm.read_only_udm.target.asset.ip: Newly mapped `neighbor_ip` raw log field to `event.idm.read_only_udm.target.asset.ip` UDM field. - event.idm.read_only_udm.network.session_id: Newly mapped `session_id` raw log field to `event.idm.read_only_udm.network.session_id` UDM field. - event.idm.read_only_udm.additional.fields: Newly mapped `task_id`, `bgp_error_code`, `bgp_error_subcode`, `radius_method_list`, `start_time`, `timezone` and `elapsed_time` raw log field to `event.idm.read_only_udm.additional.fields` UDM field.
2025-10-15	Enhancement: - event.idm.read_only_udm.additional.fields: Newly mapped `vlan_id` raw log field to `event.idm.read_only_udm.additional.fields`. - Enhanced date parsing for `event.idm.read_only_udm.metadata.event_timestamp` to add support for "MMM d HH:mm:ss" and "MMM dd HH:mm:ss" date formats. - Updated syslog grok patterns to parse the raw log field `timestamp` using both `SYSLOGTIMESTAMP` and `TIMESTAMP_ISO8601` patterns.
2024-06-07	Enhancement: - Added a Grok pattern to parse the new pattern of SYSLOG format logs. - Mapped "principal_mac" to "principal.mac". - Mapped "principal_port" to "principal.port".
2024-03-17	Enhancement: - Added a Grok pattern to parse SYSLOG format logs. - Mapped "user" to "principal.user.userid". - Mapped "proto" to "network.application_protocol". - Mapped "prin_ip" to "principal.ip".
2022-08-03	Newly created parser