Summary

Investigate how the collector utilizes time and passes that information to a data store, specifically loki. We need to answer:

• How do I search for a log message from a given time range?
• What time value is sent with the log message: CRIO time, timestamp in the message, time log collected, time ingested
• What value is set in the 'timestamp' (e.g. @timestamp) of the log envelope?

Ref: 

* loki aggregated logs use log scraping timestamp instead of source timestamp
* With upstream loki, it is possible to modify timestamps to use the source timestamp instead of the scraping timestamp, but with Openshift Loki Operator such a modification is not possible,