Native API - Get Dataset Download Count endpoint

[g-saracca]

Overview of the Feature Request
For the SPA, in order to replicate the "classic" download count, we need a new Native API endpoint that returns the Dataset download count (not makeDataCount related) as used in this dataverse repo code

What kind of user is the feature intended for?
API User

What inspired the request?
SPA Q1 Roadmap

[qqmyers]

To handle both the classic case, and the need to show the counts before MDC logging started in the MDC case, you'll probably want an API call that handles a cut-off date or has a preMDC=true flag as an option. FWIW - the counts used in JSF are coming from

dataverse/src/main/java/edu/harvard/iq/dataverse/GuestbookResponseServiceBean.java

Line 925 in f4380ea

public Long getDownloadCountByDatasetId(Long datasetId, LocalDate date) {

(for use with MDC, using the MDC start date from

dataverse/src/main/java/edu/harvard/iq/dataverse/SettingsWrapper.java

Line 482 in f4380ea

public LocalDate getMDCStartDate() {

) or the convenience method a few lines up that take no date (for classic).