Fix message content order: text before image

- Change content order from [image, text] to [text, image]
- Matches olmOCR pipeline.py build_page_query implementation
- Order can affect VLM behavior and output quality

This could fix issues with missing YAML front matter and output quality.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

olmocr2-vllm.py

@@ -134,13 +134,13 @@ def make_ocr_message(
     pil_img.save(buf, format="PNG")
     data_uri = f"data:image/png;base64,{base64.b64encode(buf.getvalue()).decode()}"
 
-    # Return message in vLLM format
+    # Return message in vLLM format (text before image, matching olmOCR pipeline)
     return [
         {
             "role": "user",
             "content": [
-                {"type": "image_url", "image_url": {"url": data_uri}},
                 {"type": "text", "text": prompt},
+                {"type": "image_url", "image_url": {"url": data_uri}},
             ],
         }
     ]