Adds changelog entry

Author: mzschwartz5

CHANGES.md

@@ -4,6 +4,10 @@
 
 ### @cesium/engine
 
+#### Additions :tada:
+
+- `ClippingPolygons` now use an algorithm, based on the techniques used for vector tiles, that vastly improves quality across distance scales. Warm-up cost is also modestly decreased. [#13654](https://github.com/CesiumGS/cesium/pull/13654)
+
 #### Fixes :wrench:
 
 - Fixed draped vector polylines rendering at twice their specified width, and antialiased their edges. Antialiasing can be turned off with `scene.vectorProvider.antialias` if you prefer the extra performance. [#13675](https://github.com/CesiumGS/cesium/pull/13675)
@@ -12,6 +16,10 @@
 - Fixed feature ID textures ignoring the wrap mode declared by the glTF sampler. Forcing nearest filtering no longer replaces `wrapS` and `wrapT` with `CLAMP_TO_EDGE`. [#11574](https://github.com/CesiumGS/cesium/issues/11574)
 - Fixed vertical exaggeration for models and tilesets with existing scale factors, so they now exaggerate proportionally to the rest of the scene. [#13518](https://github.com/CesiumGS/cesium/pull/13518)
 
+#### Deprecated :hourglass_flowing_sand:
+
+- Deprecates the recently added `quality` field on `ClippingPolygonCollection`. The new implementation of `ClippingPolygons` offers the highest possibly quality by default. The `debugShowDistanceTexture` field is also deprecated, as the new implementation no longer uses a distance texture. Similarly, the `destroy` and `isDestroyed` methods have been deprecated, since the class no longer owns its own resources which require release or destruction.
+
 ## 1.144 - 2026-08-01
 
 ### @cesium/engine