Change log for IBM_LTO

Date Changes
2026-06-09 - Added new grok patterns to parse new format of SYSLOG logs.
- event.idm.read_only_udm.metadata.product_event_type: Newly mapped product_event_type field with event.idm.read_only_udm.metadata.product_event_type UDM field.
- event.idm.read_only_udm.additional.fields: Newly mapped error_code and location raw log fields with event.idm.read_only_udm.additional.fields UDM field.
- event.idm.read_only_udm.metadata.event_type: Mapped event.idm.read_only_udm.metadata.event_type as USER_LOGIN when action_message is logged in.
- event.idm.read_only_udm.metadata.event_type: Mapped event.idm.read_only_udm.metadata.event_type as USER_LOGOUT when action_message is logged out.
2024-05-02 - Newly created parser.