Port set_stat and COMSIG_MOB_STATCHANGE from TG

modular_citadel/code/modules/reagents/chemistry/reagents/fermi_reagents.dm

@@ -451,7 +451,7 @@
 	if(H.InCritical())
 		perma = TRUE
 		volume = 5
-		H.stat = DEAD
+		H.set_stat(DEAD)
 		catto.origin = H
 
 /datum/reagent/fermi/secretcatchem/on_mob_life(mob/living/carbon/H)
@@ -488,7 +488,7 @@
 		var/mob/living/simple_animal/pet/cat/custom_cat/catto = L
 		if(catto.origin)
 			var/mob/living/carbon/human/H = catto.origin
-			H.stat = CONSCIOUS
+			H.set_stat(CONSCIOUS)
 			log_reagent("FERMICHEM: [catto] ckey: [catto.key] has returned to normal.")
 			to_chat(catto, "<span class='notice'>Your body shifts back to normal!</span>")
 			H.forceMove(catto.loc)