fix(Core/Scripts): Fix DK Gargoyle not resuming attack after CC (#25318)

Co-authored-by: blinkysc <blinkysc@users.noreply.github.com>

src/server/scripts/Pet/pet_dk.cpp

@@ -209,6 +209,16 @@ struct npc_pet_dk_ebon_gargoyle : ScriptedAI
             _decisionTimer -= diff;
             if (!UpdateVictimWithGaze())
             {
+                // Re-engage if we still have a valid victim but lost engagement
+                // (e.g., PvP combat reference expired during CC like Cyclone)
+                if (Unit* victim = me->GetVictim())
+                {
+                    if (me->IsValidAttackTarget(victim))
+                    {
+                        me->EngageWithTarget(victim);
+                        return;
+                    }
+                }
                 MySelectNextTarget();
                 return;
             }
@@ -356,6 +366,26 @@ struct npc_pet_dk_army_of_the_dead : public AggressorAI
         if (me->IsValidAttackTarget(attacker))
             AttackStart(attacker);
     }
+
+    void UpdateAI(uint32 diff) override
+    {
+        if (!UpdateVictim())
+        {
+            // Re-engage if we still have a valid victim but lost engagement
+            // (e.g., combat reference expired during CC like knockback)
+            if (Unit* victim = me->GetVictim())
+            {
+                if (me->IsValidAttackTarget(victim))
+                {
+                    me->EngageWithTarget(victim);
+                    return;
+                }
+            }
+            return;
+        }
+
+        DoMeleeAttackIfReady();
+    }
 };
 
 struct npc_pet_dk_dancing_rune_weapon : public NullCreatureAI