fix(gateway): release the user session count on a handoff fence (#2284)

fluxer_gateway/src/session/session_lifecycle.erl

@@ -56,6 +56,7 @@ any_hash_matches(AuthHash, Hashes) ->
 
 -spec terminate(term(), session_state()) -> ok.
 terminate(_Reason, State) ->
+    try_decrement_user_sessions(State),
     maybe_release_transferred_resources(State),
     try_cleanup_guild_monitors(State),
     try_cleanup_call_monitors(State),
@@ -66,7 +67,6 @@ terminate(_Reason, State) ->
 maybe_release_transferred_resources(#{fenced := true}) ->
     ok;
 maybe_release_transferred_resources(State) ->
-    try_decrement_user_sessions(State),
     try_voice_disconnect(State),
     try_cleanup_presence(State),
     ok.