Add telemetry for priority commits

Summary: As title.

Reviewed By: jaher

Differential Revision: D85261297

fbshipit-source-id: 3de10296c3ca3ca8340234b983ebd6baee6a91cf

Author: patelarjav

src/wa_raft_queue.erl

@@ -229,6 +229,7 @@ registered_name(Table, Partition) ->
 commit_started(#queues{counters = Counters} = Queues, Priority) ->
     case commit_queue_full(Queues, Priority) of
         true ->
+            ?RAFT_COUNT({'raft.acceptor.commit.queue.full', Priority}),
             commit_queue_full;
         false ->
             case apply_queue_full(Queues) of

src/wa_raft_server.erl

@@ -1218,7 +1218,7 @@ leader(
 ) ->
     % No size limit is imposed here as the pending queue cannot grow larger
     % than the limit on the number of pending commits.
-    ?RAFT_COUNT('raft.commit'),
+    ?RAFT_COUNT({'raft.commit', Priority}),
     State1 = case Priority of
         high ->
             State0#raft_state{pending_high = [{From, Op} | PendingHigh]};