Change log for GCP_APP_ENGINE

Date	Changes
2025-12-29	- event.idm.read_only_udm.principal.ip: Newly mapped protoPayload.requestMetadata.callerIp raw log field with event.idm.read_only_udm.principal.ip UDM field. - event.idm.read_only_udm.principal.asset.ip: Newly mapped protoPayload.requestMetadata.callerIp raw log field with event.idm.read_only_udm.principal.asset.ip UDM field. - event.idm.read_only_udm.principal.user.email_addresses: Newly mapped protoPayload.authenticationInfo.principalEmail raw log field with event.idm.read_only_udm.principal.user.email_addresses UDM field. - event.idm.read_only_udm.metadata.product_event_type: Newly mapped protoPayload.methodName raw log field with event.idm.read_only_udm.metadata.product_event_type UDM field. - event.idm.read_only_udm.target.resource.name: Newly mapped protoPayload.resourceName raw log field with event.idm.read_only_udm.target.resource.name UDM field. - event.idm.read_only_udm.target.application: Newly mapped protoPayload.serviceName raw log field with event.idm.read_only_udm.target.application UDM field. - event.idm.read_only_udm.target.resource.attribute.labels: Newly mapped protoPayload.resourceLocation.currentLocations raw log field with event.idm.read_only_udm.target.resource.attribute.labels UDM field. - event.idm.read_only_udm.principal.resource.attribute.labels: Newly mapped protoPayload.authenticationInfo.oauthInfo.oauthClientId raw log field with event.idm.read_only_udm.principal.resource.attribute.labels UDM field. - event.idm.read_only_udm.additional.fields: Newly mapped protoPayload.requestMetadata.requestAttributes.time, operation.first, protoPayload.serviceData.updateService.request.updateMask, operation.id, protoPayload.authenticationInfo.serviceAccountKeyName raw log fields with event.idm.read_only_udm.additional.fields UDM field. - event.idm.read_only_udm.security_result.rule_name: Newly mapped protoPayload.authorizationInfo.permission raw log field with event.idm.read_only_udm.security_result.rule_name UDM field. - event.idm.read_only_udm.security_result.description: Newly mapped protoPayload.authorizationInfo.permissionType raw log field with event.idm.read_only_udm.security_result.description UDM field. - event.idm.read_only_udm.security_result.action: Newly mapped protoPayload.authorizationInfo.granted raw log field with event.idm.read_only_udm.security_result.action UDM field. - The conditional logic for security_result.severity was updated to include NOTICE in addition to INFO for setting the severity to INFORMATIONAL.
2024-08-01	- If principal machine data is present, then set metadata.event_type to STATUS_UPDATE. - Mapped protoPayload.ip to principal.ip and principal.asset.ip. - Mapped protoPayload.appId to principal.resource.attribute.labels. - Mapped protoPayload.host to principal.hostname. - Mapped protoPayload.method to network.http.method. - Mapped protoPayload.@type , labels.clone_id and operation.producer to additional.labels.
2024-06-03	- Added support for a new type of JSON logs.
2024-03-05	- Newly created parser.