ocr: pin transformers<5 in dots-ocr (#86)

Same failure as dots-mocr (#76): the model's remote code calls
AutoProcessor.register with a string key, which transformers v5
rejects. Hit on the 2026-07-08 MOH benchmark run.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: davanstrien

ocr/dots-ocr.py

@@ -8,6 +8,10 @@
 #     "tqdm",
 #     "toolz",
 #     "torch",
+#     # dots.ocr's remote code (AutoProcessor.register with a string key)
+#     # breaks on transformers v5; vllm pulls transformers unpinned.
+#     # Same fix as dots-mocr (#76).
+#     "transformers<5",
 # ]
 #
 # ///