Ports techweb backend refactor & co.

from https://github.com/Citadel-Station-13/Citadel-Station-13/pull/9737

code/modules/mining/machine_processing.dm

@@ -121,7 +121,7 @@
 	dat += "<b>Smelt Alloys</b><br>"
 
 	for(var/v in stored_research.researched_designs)
-		var/datum/design/D = stored_research.researched_designs[v]
+		var/datum/design/D = SSresearch.techweb_design_by_id(v)
 		dat += "<span class=\"res_name\">[D.name] "
 		if (selected_alloy == D.id)
 			dat += " <i>Smelting</i>"

code/modules/mining/machine_redemption.dm

@@ -209,7 +209,7 @@
 
 		data["alloys"] = list()
 		for(var/v in stored_research.researched_designs)
-			var/datum/design/D = stored_research.researched_designs[v]
+			var/datum/design/D = SSresearch.techweb_design_by_id(v)
 			data["alloys"] += list(list("name" = D.name, "id" = D.id, "amount" = can_smelt_alloy(D)))
 
 	if (!mat_container)