Change log for GUARDIUM

Date	Changes
2023-12-15	Enhancement: - Added support for LEEF format logs.
2022-10-06	Added Grok pattern to parse syslog logs. - Changed 'observer.hostname' mapping to 'intermediary.hostname'. - Changed 'observer.ip' mapping to 'intermediary.hostname'.
2022-09-06	Enhancement: - Migrated customer-specific parser to default and also removed customer-specific parser.
2022-07-08	Enhancement: - Modified mapping for "user_role" from "target.user.role_name" to "target.user.attribute.roles".
2022-06-30	Enhancement: Added mappings for the following fields: - Mapped "timestamp" to "metadata.collected_timestamp" - Mapped SQL to "security_result.summary"
2022-05-17	Enhancement: Modified the parser to support logs that are in "CEF" format.
2022-03-24	Enhancement: Added mappings for the following new fields: "Full SQL ID" field mapped to "event.idm.read_only_udm.target.process.pid". "Session ID" field mapped to "event.idm.read_only_udm.network.session_id".