Fix startup double runtimes again (#56047)

Prevents runtimes that occur before /world/New is called from runtiming in /world/Error due to lack of the config being loaded.

code/controllers/configuration/configuration.dm

@@ -21,6 +21,9 @@
 	var/motd
 	var/policy
 
+	/// If the configuration is loaded
+	var/loaded = FALSE
+
 	var/static/regex/ic_filter_regex
 
 /datum/controller/configuration/proc/admin_reload()
@@ -53,6 +56,8 @@
 	LoadPolicy()
 	LoadChatFilter()
 
+	loaded = TRUE
+
 	if (Master)
 		Master.OnConfigLoad()