Change log for PAN_CORTEX_XDR_EVENTS

Date Changes
2025-05-15 Enhancement:
- event.idm.read_only_udm.target.file.md5: Newly mapped `action_file_md5` raw log field with `event.idm.read_only_udm.target.file.md5` UDM field
- event.idm.read_only_udm.target.file.sha256: Newly mapped `action_file_sha256` raw log field with `event.idm.read_only_udm.target.file.sha256` UDM field
2025-03-19 Enhancement:
- Mapped "action_module_md5" to "target.process.file.md5".
- Mapped "action_module_sha256" to "target.process.file.sha256".
2023-12-15 Enhancement:
- Mapped "event_timestamp" to "metadata.event_timestamp".
- When "event_type" is "5/6" and "action_remote_ip", "action_local_ip", "agent_hostname" are null, then mapped "metadata.event_type" to "GENERIC_EVENT."
2023-02-01 Newly created parser.