Validate supplied components in imported player data

An import with `crafting_queue: {}` passed the schema and broke the
next restore in deserialize_crafting_queue. The import schema now
checks the members module/serialize.lua reads from the crafting queue,
quick bar, personal logistic slots and character stats, while still
allowing a component to be left out.

Character stats missing from the data are left as they are instead of
being set to nil.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

plugins/player_sync/module/serialize.lua

@@ -69,7 +69,10 @@ end
 --- Restore the stats of a character, the inventories are restored with place_items
 function serialize.deserialize_character(character, serialized)
 	for _, key in pairs(character_stat_keys) do
-		character[key] = serialized[key]
+		-- Missing from imports and from data saved by another Factorio version
+		if serialized[key] ~= nil then
+			character[key] = serialized[key]
+		end
 	end
 end