Update version guide: add validation step and git-lfs upload method

- Added step 13: Validate Parquet files before upload
- Updated step 14: Document git-lfs upload method (used for 2.17)
- Renumbered remaining steps

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

ADDING_NEW_UD_VERSION.md

@@ -242,10 +242,32 @@ git push origin 2.18
 git push origin --tags
 ```
 
-### 13. Upload to HuggingFace Hub
+### 13. Validate Parquet Files
+
+```bash
+# Test validation on 3 treebanks first
+python 05_validate_parquet.py --test
+
+# If successful, validate all treebanks (optional, takes ~30-60 minutes)
+python 05_validate_parquet.py
+
+# This validates:
+# - Data loads correctly from HuggingFace Hub
+# - All fields round-trip correctly
+# - MWT information is preserved
+# - Token sequences exclude MWT forms (v2.0 bug fix)
+```
+
+### 14. Upload to HuggingFace Hub
 
 ```bash
 # Upload Parquet files to HuggingFace (this may take several hours)
+# Note: If using git-lfs, commit and push instead:
+git add parquet/
+git commit -m "Add Parquet files for all treebanks"
+git push origin 2.18
+
+# Alternative: Use huggingface-cli (if not using git-lfs)
 huggingface-cli upload commul/universal_dependencies ./parquet --repo-type dataset --revision 2.18
 
 # Upload main files
@@ -259,7 +281,7 @@ huggingface-cli upload commul/universal_dependencies ./metadata.json --repo-type
 
 **Expected upload time:** 2-6 hours depending on network speed and HuggingFace server load.
 
-### 14. Verify on HuggingFace Hub
+### 15. Verify on HuggingFace Hub
 
 Visit: https://huggingface.co/datasets/commul/universal_dependencies
 
@@ -279,7 +301,7 @@ Visit: https://huggingface.co/datasets/commul/universal_dependencies
    print(ds)
    ```
 
-### 15. Update Dataset Card (Optional)
+### 16. Update Dataset Card (Optional)
 
 If this is now the latest version, you may want to update the dataset card to mention it: