More accurate representaton of what was searched for in the search output link URL

[d0roppe]

Is your feature request related to a problem? Please describe.
When you issue a search to FHIR, it outputs a link url that has what it searched on. Like adding the _count if one was not issued, or adding the _page=1. but it also fills in information like expanding out the time if you searched on a date. but that time is not really what was searched on.

Describe the solution you'd like
Would like the link url to accuratly show what was searched on especially for date/time
like a search on _lastUpdated=2020-04 is represented in the output link url as _lastUpdated=2020-04-01T00:00:00Z but that is not what the search was.

Describe alternatives you've considered

Acceptance Criteria

Additional context

[kmbarton423]

either of the following is acceptable:

• self url in response matches the partial datetime passed in the request
• specify the range actually used

[tbieste]

Dates in the link urls (self, prev, next) will match the partial dates passed in the request. This will allow paging to work properly.

[d0roppe]

verified with multiple date searches.