enable Participation Metrics in DataWarehouse

[#1]

currently participation metrics are not available in the data warehouse

this would be helpful in building user segments, e.g. ability to create segments of users based on participation metrics

[#2]

Participation Metrics enabled in data warhouse reports would be amazing! Then we would be able to see participation metrics broken down by the hour and understand the effects of site performance on participation.

[#3]

Would like to view by first touch or linear as well for data warehouse.

[#4]

Attribution models are not applied to Data Warehouse or Data Feed exports, because they are applied at report-run time.