Change log for RECORDED_FUTURE_IOC

Date Changes
2025-04-11 Enhancement:
- Updated parser to parse each log entry into single event instead of multiple events.
- event.ioc.categorization: Removed mapping of `detail.Rule` from `event.ioc.categorization` UDM field.
- event.ioc.description: Removed mapping of `detail.EvidenceString` from `event.ioc.description` UDM field.
- event.ioc.raw_severity: Removed mapping of `detail.CriticalityLabel` from `event.ioc.raw_severity` UDM field.
- event.idm.entity.metadata.threat.first_discovered_time: Newly mapped `detail.FirstSeen` raw log field with `event.idm.entity.metadata.threat.first_discovered_time` UDM field.
2025-04-07 Enhancement:
- `event.idm.ready_only_udm.metadata.threat.risk_score`: Newly mapped "risk_score" raw log field with "event.idm.ready_only_udm.metadata.threat.risk_score" UDM field.
- Added conversion of `event.idm.ready_only_udm.metadata.threat.risk_score` to float.