fix(Core/Combat): Training dummy stuck combat after pet recall (#25565)

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

src/server/scripts/World/npcs_special.cpp

@@ -329,6 +329,12 @@ struct npc_training_dummy : NullCreatureAI
             return;
 
         _combatTimer[attacker->GetGUID()] = 5s;
+
+        // Pet attacks engage the owner via propagation without firing
+        // JustEnteredCombat here, so track the owner's timer too.
+        if (Unit* owner = attacker->GetCharmerOrOwner())
+            if (me->GetCombatManager().IsInCombatWith(owner))
+                _combatTimer[owner->GetGUID()] = 5s;
     }
 
     void UpdateAI(uint32 diff) override