Intent to implement: cross library imp.ext.tid

[patmmccann]

Type of issue

Feature request

Description

request bids will take imp.ext.tid array on the request, likely somehow in the auction specific ortb object.

We also plan to publish an example generating said ids for use in APS and Prebid.

The ids should have minimum length and complexity checks, and should not be allowed on bidder specific ortb config, only global.

The prebid server adapter must pick them up, as well as the ortb2 conversion utility.

Ideally we'll also figure out how to pass them in encrypted signals, although this may be challenging as encrypted signals are not known to be impression level.

Related; #8543