[ENG-8936] API: Allow /v2/users/me/preprints list view to filter by tags (#11232)

Author: ihorsokhanexoft

api/base/filters.py

@@ -605,6 +605,9 @@ def postprocess_query_param(self, key, field_name, operation):
         if field_name == 'subjects':
             self.postprocess_subject_query_param(operation)
 
+        if field_name == 'tags':
+            super().postprocess_query_param(key, field_name, operation)
+
     def preprints_queryset(self, base_queryset, auth_user, allow_contribs=True, public_only=False, latest_only=False):
         preprints = Preprint.objects.can_view(
             base_queryset=base_queryset,

api/preprints/serializers.py

@@ -102,6 +102,7 @@ class PreprintSerializer(TaxonomizableSerializerMixin, MetricsSerializerMixin, J
         'subjects',
         'reviews_state',
         'node_is_public',
+        'tags',
     ])
     available_metrics = frozenset([
         'downloads',