Restore recipe notifications a prefetched copy would leave cleared

A prefetched copy is sent without the save's list of cleared recipes, so
its delta had only add, and a recipe cleared on the destination but not
in the stored list stayed cleared where a download would give it its
notification back. Without a current list the instance now sends the
whole stored list marked full, and the save gives the recipes it has
cleared that aren't in it their notification back, as a download's
remove does.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

plugins/player_sync/module/serialize.lua

@@ -895,6 +895,7 @@ end
 --- @class CraftingNotificationDelta
 --- @field add string[]? Recipes cleared elsewhere that still have a notification here
 --- @field remove string[]? Recipes with a notification elsewhere that are cleared here
+--- @field full boolean? add is the whole stored list, sent without this save's (a prefetched copy)
 
 --- @param player LuaPlayer
 --- @param serialized string Encoded delta against the state sent with the download request
@@ -929,6 +930,23 @@ function serialize.deserialize_crafting_notifications(player, serialized)
 		end
 	end
 
+	-- A full delta has no remove: recipes cleared here that aren't in add get their notification back, as remove does
+	if delta.full then
+		local stored = {}
+		for _, recipe_name in pairs(delta.add or {}) do
+			stored[recipe_name] = true
+		end
+		local notified = {}
+		for _, recipe in pairs(player.get_recipe_notifications()) do
+			notified[recipe.name] = true
+		end
+		for recipe_name in pairs(enabled) do
+			if not stored[recipe_name] and not notified[recipe_name] then
+				player.add_recipe_notification(recipe_name)
+			end
+		end
+	end
+
 	return next(failed) and failed or nil
 end