For transitions between content version RESTBase wants to utilize content negotiation via the Accept header (T128040). Right now we want to use that to transition to the new version of the summary endpoint. However, figuring out the exact migration strategy depends on how many clients set the Accept header and which values do the set there. Without this data we can only guess the best strategy.
Could the Accept header be added to the webrequest table so that we could run queries to identify the distribution of accept headers and identify the clients which don't sent the header, or send it incorrectly?