Added: release notes for #9995

doc/release-notes/9995-files-api-downloadsize-with-criteria-and-deaccessioned-support.md

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+Extended the getDownloadSize endpoint (/api/datasets/{id}/versions/{versionId}/files/downloadsize), including the following new features:
+
+- The endpoint now accepts a new boolean optional query parameter "includeDeaccessioned", which, if enabled, causes the endpoint to consider deaccessioned dataset versions when searching for versions to obtain the file total download size.
+
+
+- The endpoint now supports filtering by criteria. In particular, it accepts the following optional criteria query parameters:
+
+  - contentType
+  - accessStatus
+  - categoryName
+  - tabularTagName
+  - searchText