fix(NPE): fix NPE in EntityService

* On some database failures null is found in the stream, filter it to avoid red herring stacktrace

metadata-io/src/main/java/com/linkedin/metadata/entity/EntityServiceImpl.java

@@ -1041,6 +1041,7 @@ private List<UpdateAspectResult> ingestAspectsToLocalDB(
             inputBatch,
             DEFAULT_MAX_TRANSACTION_RETRY)
         .stream()
+        .filter(Objects::nonNull)
         .flatMap(List::stream)
         .collect(Collectors.toList());
   }