MENDELU/Added a new search filter by accesioned date

[milanmajchrak]

Problem description

Analysis

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Problems

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Manual Testing (if applicable)

• Added to testing scenarios

Copilot review

• Requested review from Copilot

[Copilot]

Pull request overview

Adds a new Discovery facet/filter for accessioned date (dc.date.accessioned) so it can be used in the sidebar facets and on the search filter page, and updates REST integration tests/matchers accordingly.

Changes:

• Registers searchFilterDateAccessioned in the default Discovery sidebar facets and search filters.
• Defines the new DiscoverySearchFilterFacet bean mapping to dc.date.accessioned with type=date and min/max exposure enabled.
• Extends REST test matchers and min/max facet integration tests to include the new facet.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
dspace/config/spring/api/discovery.xml	Adds searchFilterDateAccessioned facet/filter and wires it into the default Discovery configuration.
dspace-server-webapp/src/test/java/org/dspace/app/rest/matcher/FacetEntryMatcher.java	Adds matchers for the new dateAccessioned facet (with and without min/max).
dspace-server-webapp/src/test/java/org/dspace/app/rest/DiscoveryRestControllerIT.java	Updates min/max facet tests to expect the new facet in responses.
dspace-server-webapp/src/test/data/dspaceFolder/config/spring/api/test-discovery.xml	Updates the test Discovery configuration to include the new facet/filter.