allow page as query param by default

backend/metagenedb/api/catalog/qparams_validators/base.py

+from marshmallow import Schema, fields
+
+
+class PaginatedQueryParams(Schema):
+    page = fields.Integer()

backend/metagenedb/api/catalog/qparams_validators/empty.py

-from marshmallow import Schema
-
-
-class EmptyQueryParams(Schema):
-    pass

backend/metagenedb/api/catalog/qparams_validators/function.py

-from marshmallow import Schema, fields
+from marshmallow import fields
 
+from .base import PaginatedQueryParams
 
-class FunctionQueryParams(Schema):
+
+class FunctionQueryParams(PaginatedQueryParams):
     detailed = fields.Boolean()

backend/metagenedb/api/catalog/qparams_validators/taxonomy.py

-from marshmallow import Schema, fields
+from marshmallow import fields
 
+from .base import PaginatedQueryParams
 
-class TaxonomyQueryParams(Schema):
+
+class TaxonomyQueryParams(PaginatedQueryParams):
     rank = fields.String()
     name = fields.String()

backend/metagenedb/api/catalog/views/bulk_viewset.py

@@ -3,11 +3,11 @@ from rest_framework import status
 from rest_framework.response import Response
 from rest_framework.viewsets import ModelViewSet
 
-from metagenedb.api.catalog.qparams_validators.empty import EmptyQueryParams
+from metagenedb.api.catalog.qparams_validators.base import PaginatedQueryParams
 
 
 class BulkViewSet(ModelViewSet):
-    query_params_parser = EmptyQueryParams
+    query_params_parser = PaginatedQueryParams
 
     def get_objects(self, instance_ids):
         return self.queryset.in_bulk(instance_ids, field_name=self.lookup_field)