Add logging of Manifest SQN at startup

src/leveled_log.erl

@@ -126,6 +126,8 @@
     {"P0034",
         {warn, "Snapshot with pid ~w timed out and so deletion will "
                     ++ "continue regardless"}},
+    {"P0035",
+        {info, "Startup with Manifest SQN of ~w~n"}},
     {"PC001",
         {info, "Penciller's clerk ~w started with owner ~w"}},
     {"PC002",

src/leveled_penciller.erl

@@ -610,7 +610,7 @@ start_from_file(PCLopts) ->
                                                             SQNFun),
     leveled_log:log("P0014", [MaxSQN]),
     ManSQN = leveled_manifest:get_manifest_sqn(Manifest1),
-    
+    leveled_log:log("P0035", [ManSQN]),
     %% Find any L0 files
     L0FN = filepath(RootPath, ManSQN, new_merge_files) ++ "_0_0.sst",
     case filelib:is_file(L0FN) of