Performance boost with Rust Engnine, added fluentd interface &more

[ddbnl]

• Implemented a new Rust engine that drastically improves performance and adds stability.
• Added a fluentd interface with a PR from @owentl, thank you!
• Added a default timestamp field for graylog to support native searching of Audit logs by CreationDate
• Added self scheduling from config file as optional alternative to CRON / Task scheduler (off by default). 'schedule.yaml' config example
• Bug fixes

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