fix(Core/Scripts): Fix Valithria Dreamwalker encounter and default JustExitedCombat (#25315)

Co-authored-by: ForesterDev <11771800+ForesterDev@users.noreply.github.com>

src/server/game/AI/CreatureAI.cpp

@@ -309,12 +309,8 @@ void CreatureAI::EngagementOver()
 
 void CreatureAI::JustExitedCombat()
 {
-    EngagementOver();
-
-    // If creature is alive, in world, and not already evading, trigger evade to return home
-    // Check IsInWorld to avoid evade during server shutdown/cleanup
-    if (me->IsAlive() && me->IsInWorld() && !me->IsInEvadeMode())
-        EnterEvadeMode(EVADE_REASON_NO_HOSTILES);
+    // Creatures evade through UpdateVictim() detecting out-of-combat state.
+    // Scripts that need custom combat-exit behavior should override this.
 }
 
 /*void CreatureAI::AttackedBy(Unit* attacker)