[r] Increase accumulator limit for matrices.file in HCA (#6793)

Author: dsotirho-ucsc

src/azul/plugins/metadata/hca/indexer/aggregate.py

@@ -327,7 +327,7 @@ def _accumulator(self, field) -> Accumulator | None:
         if field == 'document_id':
             return None
         elif field == 'file':
-            return DictAccumulator(max_size=100, key=itemgetter('uuid'))
+            return DictAccumulator(max_size=600, key=itemgetter('uuid'))
         else:
             return SetAccumulator()