Weakref cleanup (#19382)

* oh god help

* fixes

* oops

* container runtime

---------

Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/game/objects/effects/anomalies/anomalies_bioscrambler.dm

@@ -20,6 +20,10 @@
 	. = ..()
 	pursuit_target = WEAKREF(find_nearest_target())
 
+/obj/effect/anomaly/bioscrambler/Destroy()
+	. = ..()
+	pursuit_target = null
+
 /obj/effect/anomaly/bioscrambler/anomalyEffect(seconds_per_tick)
 	. = ..()
 	if(stats)

code/game/objects/effects/anomalies/anomaly_stats.dm

@@ -31,6 +31,8 @@
 
 /datum/anomaly_stats/Destroy(force)
 	QDEL_NULL(modifier)
+	attached_anomaly = null
+	attached_harvester = null
 	return ..()
 
 /datum/anomaly_stats/proc/randomize_particle_types()

code/game/objects/effects/client_only_image.dm

@@ -15,6 +15,7 @@
 		var/client/C = CW?.resolve()
 		if(C)
 			C.images -= src
+	clients.Cut()
 
 // Mostly for motion echos, but someone will probably find another use for it... So parent type gets it instead!
 /image/client_only/proc/place_from_root(var/turf/At)