Add setBoundingUpdateBudget for incremental per-frame bounds update in SkinningControl

Agent-Logs-Url: https://github.com/jMonkeyEngine/jmonkeyengine/sessions/3d4465a6-f250-44fe-b834-04690fbb77f2

Co-authored-by: riccardobl <4943530+riccardobl@users.noreply.github.com>

Author: Copilot

jme3-core/src/main/java/com/jme3/anim/SkinningControl.java

@@ -1052,6 +1052,7 @@ public void read(JmeImporter im) throws IOException {
         armature = (Armature) in.readSavable("armature", null);
         updateBounds = in.readBoolean("updateBounds", false);
         boundingUpdateBudget = in.readInt("boundingUpdateBudget", Integer.MAX_VALUE);
+        boundsUpdateStates = new HashMap<>();
 
         for (MatParamOverride mpo : spatial.getLocalMatParamOverrides().getArray()) {
             if (mpo.getName().equals("NumberOfBones") || mpo.getName().equals("BoneMatrices")) {