Always return classifier results as suggestion

The classifier results are spliced into the suggestion list at second
place. When linking they are only used if nlp didn't find anything.

modules/joex/src/main/scala/docspell/joex/learn/LearnClassifierTask.scala

@@ -26,6 +26,7 @@ object LearnClassifierTask {
   ): Task[F, Args, Unit] =
     learnTags(cfg, analyser)
       .flatMap(_ => learnItemEntities(cfg, analyser))
+      .flatMap(_ => Task(_ => Sync[F].delay(System.gc())))
 
   private def learnItemEntities[F[_]: Sync: ContextShift](
       cfg: Config.TextAnalysis,