Change log for OPSWAT_METADEFENDER

Date Changes
2024-10-29 Enhancement:
- Mapped "IP address" to "principal.ip".
- Mapped "Sender" to "network.email.from".
- Mapped "Recipients" to "network.email.to".
- Mapped "Subject" to "metadata.description".
- Mapped "OMSreason" to "security_result.action_details".
- Mapped "OMSemail_sender" to "network.email.from".
- Mapped "OMSemail_recipients" to "network.email.to".
- Mapped "OMSsha256sum" to "target.file.sha256".
2024-10-03 Newly created parser.