fix: It helps if you call commit

Signed-off-by: Ryan Roberts <ryan@blockchaintp.com>

core/src/main/java/com/blockchaintp/daml/participant/StateAccess.java

@@ -119,6 +119,7 @@ public Future<Long> appendToLog(final Raw.LogEntryId key, final Raw.Envelope val
       var work = sequenceAllocation.serialisedBegin(key)
           .thenCompose(seq -> CompletableFuture.supplyAsync(() -> Functions.uncheckFn(() -> {
             writer.sendEvent(key, value);
+            writer.commit(key);
             return seq;
           }).apply())).thenCompose(seq -> sequenceAllocation.serialisedCommit(seq));