Implement solution for Eclipse market

Currently, the Eclipse market in the marketplace is a pseudo market that is injected into listing entries that match a set of criteria. In the current implementation, we are looking to limit the number of markets that a listing may be in to one.

A potential solution to this may be that as part of the POST to the server, the microservice evaluates the posted listing. If the listing matches a set of criteria, a backend exclusive field gets added to the listing marking it as an "Eclipse solution". This will enable a new eclipseSolutionfilter on the query to easily retrieve Eclipse solutions.