Create an Ingest Pipeline that will add four fields:
event.ingested- Time when the event was processed by Elasticsearch.event.lag.read- Time difference in milliseconds between@timestampandevent.created. This measures how long it took for Winlogbeat read the event from the event log (for WEC this includes the delivery time from forwarder to collector).event.lag.ingest- Time difference in milliseconds betweenevent.createdandevent.ingested. This measures the time between Winlogbeat reading the event (time when it "created" the document) to when it was written to Elasticsearch.