Changes Obsession resilience to require a lobotomy (#71462)

## About The Pull Request

Obsessed is changed to require a lobotomy rather than brain surgery.
Also nerfs Mind Restoration so it cannot remove deep-rooted traumas.

## Why It's Good For The Game

Obsessed has been well-known for some time as being surprise ganked by
fairly low-key airborne healing viruses. Players are stripped of their
antag status with no fanfare or consequence.

With this change the cure for obsessed will require a lobotomy, which
will cause additional permanent brain traumas. This provides way more
mechanically-informed RP than losing antag due to a friendly sneeze.

## Changelog

🆑
balance: Obsessed has been bumped up to a Deep-Rooted Brain Trauma
balance: Mind Restoration can't remove deep-rooted traumas, making
Obsessed unremovable by virusses
/🆑

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code/datums/brain_damage/creepy_trauma.dm

@@ -6,7 +6,7 @@
 	lose_text = "<span class='warning'>The voices in your head fall silent.</span>"
 	can_gain = TRUE
 	random_gain = FALSE
-	resilience = TRAUMA_RESILIENCE_SURGERY
+	resilience = TRAUMA_RESILIENCE_LOBOTOMY
 	var/mob/living/obsession
 	var/datum/objective/spendtime/attachedobsessedobj
 	var/datum/antagonist/obsessed/antagonist

code/datums/diseases/advance/symptoms/sensory.dm

@@ -66,7 +66,7 @@
 			var/mob/living/carbon/C = M
 			if(prob(10))
 				if(trauma_heal_severe)
-					C.cure_trauma_type(resilience = TRAUMA_RESILIENCE_LOBOTOMY)
+					C.cure_trauma_type(resilience = TRAUMA_RESILIENCE_SURGERY)
 				else
 					C.cure_trauma_type(resilience = TRAUMA_RESILIENCE_BASIC)