Switch back to nightly vLLM, add addict + matplotlib deps

DeepSeek-OCR-2 is not in stable vLLM 0.15.1 yet (only nightly).
The nightly x86_64 builds are back (dev142). Also add addict and
matplotlib which the model's custom code requires.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

deepseek-ocr2-vllm.py

@@ -4,11 +4,19 @@
 #     "datasets>=4.0.0",
 #     "huggingface-hub",
 #     "pillow",
-#     "vllm>=0.15.1",
+#     "vllm",
 #     "tqdm",
 #     "toolz",
 #     "torch",
+#     "addict",
+#     "matplotlib",
 # ]
+#
+# [[tool.uv.index]]
+# url = "https://wheels.vllm.ai/nightly"
+#
+# [tool.uv]
+# prerelease = "allow"
 # ///
 
 """