Fix GPUFrame wrapping in fused-pipeline fallback

The fallback path was passing raw numpy/cupy arrays to GPU functions
that expect GPUFrame objects with .cpu property.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

sexp_effects/primitive_libs/streaming_gpu.py

@@ -899,7 +899,12 @@ def prim_fused_pipeline(img, effects_list, **dynamic_params):
 
     if not _FUSED_KERNELS_AVAILABLE:
         # Fallback: apply effects one by one
-        result = img
+        # Wrap in GPUFrame if needed (GPU functions expect GPUFrame objects)
+        if isinstance(img, GPUFrame):
+            result = img
+        else:
+            on_gpu = hasattr(img, '__cuda_array_interface__')
+            result = GPUFrame(img, on_gpu=on_gpu)
         for effect in effects_list:
             op = effect['op']
             if op == 'rotate':