Change log for FORTINET_FORTIMANAGER

Date Changes
2025-04-24 Enhancement:
- Masked few fields in the logs.
2025-04-16 Enhancement:
- Added support for eventtimestamp to parse the timestamp in the new format.
- event.idm.read_only_udm.additional.fields : Newly Mapped `adom` raw log field with `event.idm.read_only_udm.additional.fields` UDM Field.
- event.idm.read_only_udm.additional.fields : Newly Mapped `pkgname` raw log field with `event.idm.read_only_udm.additional.fields` UDM Field.
- event.idm.read_only_udm.additional.fields : Newly Mapped `_signal-lte-rsrq` raw log field with `event.idm.read_only_udm.additional.fields` UDM Field.
- event.idm.read_only_udm.additional.fields : Newly Mapped `_signal-lte-rssi` raw log field with `event.idm.read_only_udm.additional.fields` UDM Field.
- event.idm.read_only_udm.additional.fields : Newly Mapped `performed_on` raw log field with `event.idm.read_only_udm.additional.fields` UDM Field.
- event.idm.read_only_udm.additional.fields : Newly Mapped `changes` raw log field with `event.idm.read_only_udm.additional.fields` UDM Field.
- event.idm.read_only_udm.additional.fields : Newly Mapped `_signal-lte-rsrq-raw` raw log field with `event.idm.read_only_udm.additional.fields
2025-03-25 Enhancement:
- Added a Grok pattern to parse new pattern of syslog logs.
- Added a date block to parse the date in this new pattern of syslog logs.
2025-01-24 Enhancement:
- Added a Grok pattern to parse unparsed logs.
2024-09-18 Enhancement:
- Added "gsub" to parse unparsed logs.
2024-08-02 - Newly created parser.