Fix: Filter extracted metadata (coscine/issues#2484)

src/Metadata/MetadataRdfStoreConnector.cs

@@ -138,7 +138,7 @@ namespace Coscine.Metadata
                 ?g <{Uris.FdpHasMetadata}> ?m .
                 ?m <{Uris.FdpHasMetadata}> ?v .
                 " + ((path != null) ? "FILTER(contains(str(?m), @path)) ." : "") + $@"
-                " + (extracted ? "FILTER(contains(str(?v), '&extracted=true')) ." : "") + $@"
+                " + (extracted ? "FILTER(contains(str(?v), '&extracted=true')) ." : "FILTER(!contains(str(?v), '&extracted=true')) .") + $@"
             }}";
 
             var cmdString = new SparqlParameterizedString