Fix Inconsistent Paged Results on Disjunctive FHIR Searches

[alexanderkiel]

On FHIR Searches like [base]/Condition?code=A,B, Blaze would return some resources more than once.

The paging algorithm uses the query param __page-id to identify the ID of the resource at the top of the next page. This algorithm works if the resources are returned in increasing ID-order. But at disjunctive searches, the resources are ordered by value first and ID second. For the above query, the Condition with code A and ID 1 will be ordered before the Condition with code B and ID 0.