Change log for PROOFPOINT_TAP_THREATS

Date Changes
2025-01-09 - Newly created parser.
- Mapped id to metadata.product_log_id.
- Mapped TAP Threats to metadata.product_name.
- Mapped Proofpoint to metadata.vendor_name.
- Mapped Proofpoint_Threats_Feed to metadata.product_event_type.
- Mapped name to security_result.threat_name.
- Mapped identifiedAt to security_result.first_discovered_time.
- Mapped type to metadata.product_event_type.
- Mapped status to security_result.threat_status.
- Mapped severityScore to threat_result.severity and threat_result.severity_details.
- Mapped category to security_result.category_details.
- Mapped attackSpread to security_result.verdict_info.global_customer_count.
- Mapped geoTargeted to additional.fields.
- Mapped verticallyTargeted to additional.fields.
- Mapped notable to additional.fields and security_result.priority.
- Mapped detectionType to additional.fields.
- Mapped actors to security_result.associations.associated_actors.
- Mapped families to security_result.associations.associated_actors.
- Mapped malware to security_result.associations.associated_actors.
- Mapped techniques to security_result.attack_details.techniques.
- Mapped brands to security_result.associations.associated_actors.