Add debug output to show command being called

This will help diagnose issues with argument passing to the library.
Shows the exact command line being constructed and passed to ud-hf-parquet-tools.

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

tools/04_generate_parquet.py

@@ -38,7 +38,7 @@ UD_VER = os.getenv("UD_VER", "2.17")
 
 # Project paths
 REPO_ROOT = Path(__file__).parent.parent.resolve()
-METADATA_FILE = REPO_ROOT / f"metadata-{UD_VER}.json"
+METADATA_FILE = REPO_ROOT / f"metadata.json"
 UD_REPOS_DIR = REPO_ROOT / "tools" / "UD_repos"
 OUTPUT_DIR = REPO_ROOT / "parquet"
 
@@ -79,6 +79,11 @@ def main():
     elif args.verbose:
         tool_args.append("--verbose")
 
+    # Debug: Print the command being called (can be removed later)
+    if args.verbose and not args.quiet:
+        print(f"Calling: {' '.join(tool_args)}")
+        print()
+
     # Replace sys.argv and call the library's main function
     original_argv = sys.argv
     try: