Use leveled_codec types

... and exporting them.

Previously types wer enot exported, and it appears dialyzer treated tham as any() when they were unexported types ??!!??

src/leveled_pmanifest.erl

@@ -79,6 +79,8 @@
 -type manifest() :: #manifest{}.
 -type manifest_entry() :: #manifest_entry{}.
 
+-export_type([manifest/0, manifest_entry/0]).
+
 %%%============================================================================
 %%% API
 %%%============================================================================
@@ -306,7 +308,8 @@ switch_manifest_entry(Manifest, ManSQN, SrcLevel, Entry) ->
 get_manifest_sqn(Manifest) ->
     Manifest#manifest.manifest_sqn.
 
--spec key_lookup(manifest(), integer(), tuple()) -> false|manifest_entry().
+-spec key_lookup(manifest(), integer(), leveled_codec:ledger_key()) 
+                                                    -> false|manifest_entry().
 %% @doc
 %% For a given key find which manifest entry covers that key at that level,
 %% returning false if there is no covering manifest entry at that level.
@@ -320,7 +323,10 @@ key_lookup(Manifest, LevelIdx, Key) ->
                                 Key)
     end.
 
--spec range_lookup(manifest(), integer(), tuple(), tuple()) -> list().
+-spec range_lookup(manifest(), 
+                    integer(), 
+                    leveled_codec:ledger_key(), 
+                    leveled_codec:ledger_key()) -> list().
 %% @doc
 %% Return a list of manifest_entry pointers at this level which cover the
 %% key query range.
@@ -331,7 +337,10 @@ range_lookup(Manifest, LevelIdx, StartKey, EndKey) ->
         end,
     range_lookup_int(Manifest, LevelIdx, StartKey, EndKey, MakePointerFun).
 
--spec merge_lookup(manifest(), integer(), tuple(), tuple()) -> list().
+-spec merge_lookup(manifest(), 
+                    integer(), 
+                    leveled_codec:ledger_key(), 
+                    leveled_codec:ledger_key()) -> list().
 %% @doc
 %% Return a list of manifest_entry pointers at this level which cover the
 %% key query range, only all keys in the files should be included in the