Change log for MIKROTIK_ROUTER

Date	Changes
2025-01-21	Enhancement: - Mapped "metadata.event_type" to "NETWORK_DHCP" for DHCP logs. - Mapped "client_mac" to "principal.mac". - When "details" has "assigned", then mapped "network.dhcp.type" to "ACK". - When "details" has "deassigned", then mapped "network.dhcp.type" to "RELEASE". - When "details" has "request", then mapped "network.dhcp.type" to "REQUEST". - When "details" has "offer", then mapped "network.dhcp.type" to "OFFER".
2025-01-20	Enhancement: - Modified the Grok pattern to parse "intermediary.hostname" data.
2024-12-18	Enhancement: - Added support for new format of syslog logs.
2024-11-26	Enhancement: - Modified the Grok pattern to remove "period" from the data. - Mapped "server_name" to "target.hostname" and "target.asset.
2024-11-15	Enhancement: - Mapped "action" to "security_result.action".
2024-09-30	- Changed mapping for "username" from "principal.user.userid", "src.user.userid" to "target.user.userid". - For the login event, mapped "metadata.event_type" to "USER_LOGIN". - For the logout event, mapped "metadata.event_type" to "USER_LOGOUT". - Mapped "application" to "target.application". - Mapped "bytes_in" to "network.received_bytes". - Mapped "bytes_out" to "network.sent_bytes". - Mapped "connection_time_in_seconds", "packets_in" and "packets_out" to "security_result.detection_fields".
2024-05-28	Newly created parser.