chore: move eval_script and inference script to root.

inference.py

@@ -0,0 +1,14 @@
+"""Root-level entry point required by hackathon judges.
+
+Delegates entirely to src/inference.py so all logic stays in one place.
+Usage: python inference.py --input dataset.json --output results.json
+"""
+import sys
+import os
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "src"))
+
+from inference import main  # noqa: E402
+
+if __name__ == "__main__":
+    main()