Remove machine-local checkpoint provenance

Remove private filesystem paths from checkpoint metadata and bind policies to the clean CS-VAE container. Tensor values, training steps and model semantics are preserved.

csvae.pt

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:fbb4d3f32309b77a5f068634816752d4497fb01798c4be2292bb25690f5baafd
-size 289356611
+oid sha256:66e7d6f17da46249aa876d4956a19cef7c9d48709508588a57f2d21510098eea
+size 289348251