Pin VTK stack (pyvista 0.48.4 / vtk-egl 9.3 dev) for reproducible builds

Same drift fix as the leaderboard image: an unpinned pyvista + vtk-egl float to
latest on rebuild and mismatch (libvtkWrappingPythonCore*.so not found). Pin
pyvista==0.48.4 and vtk-egl to the latest 9.3 cp312 build.

Co-authored-by: Cursor <cursoragent@cursor.com>

Dockerfile

@@ -55,6 +55,13 @@ ARG CADGENBENCH_SHA=a47c951
 RUN python -m pip install --no-cache-dir \
         "cadgenbench @ git+https://github.com/huggingface/cadgenbench.git@${CADGENBENCH_SHA}"
 
+# Pin the VTK stack so rebuilds are reproducible. pyvista is pulled
+# transitively by cadgenbench (unpinned); without this pin a rebuild floats to
+# the latest pyvista/vtk and mismatches the headless vtk-egl swap below
+# (ImportError: libvtkWrappingPythonCore*.so not found). 0.48.4 / vtk 9.3 is
+# the known-good pair.
+RUN python -m pip install --no-cache-dir "pyvista==0.48.4"
+
 # Shard mode syncs per-fixture artifacts to an HF Storage Bucket via the
 # bucket API (HfApi.sync_bucket), which needs a recent huggingface_hub.
 RUN python -m pip install --no-cache-dir "huggingface_hub>=1.16.0"
@@ -66,9 +73,12 @@ RUN python -m pip install --no-cache-dir "huggingface_hub>=1.16.0"
 # PyVista picks up whichever `vtk` dist is installed; no
 # cadgenbench code change. Same shape as the leaderboard's
 # vtk-osmesa swap, just the GPU counterpart.
+# Pinned to a vtk 9.3 build to match pyvista==0.48.4 (vtk-egl only ships
+# date-stamped 9.3 dev wheels; this is the latest 9.3 cp312 one). An unpinned
+# vtk-egl floats and mismatches the pinned pyvista on rebuild.
 RUN python -m pip uninstall -y vtk \
     && python -m pip install --no-cache-dir \
-        --extra-index-url https://wheels.vtk.org vtk-egl
+        --extra-index-url https://wheels.vtk.org "vtk-egl==9.3.20240907.dev0"
 
 # In-job entrypoint. Invoked by:
 #