Add --metadata flag to parquet validator; fix default

tools/05_validate_parquet.py

@@ -57,7 +57,7 @@ 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 / "metadata.json"
 UD_REPOS_DIR = REPO_ROOT / "tools" / "UD_repos"
 PARQUET_DIR = REPO_ROOT / "parquet"
 
@@ -72,6 +72,7 @@ def main():
     parser.add_argument("--revision", default=UD_VER, help="HuggingFace Hub revision/branch")
     parser.add_argument("--local", action="store_true", help="Validate local parquet files")
     parser.add_argument("--parquet-dir", help="Path to local parquet directory (implies --local)")
+    parser.add_argument("--metadata", help="Path to metadata file (overrides default)")
     parser.add_argument("-v", "--verbose", action="store_true", default=True, help="Verbose output")
     parser.add_argument("-vv", "--very-verbose", action="store_true", help="Show all differences")
     parser.add_argument("-q", "--quiet", action="store_true", help="Quiet mode")
@@ -95,6 +96,12 @@ def main():
         # Remote validation
         tool_args.extend(["--revision", args.revision])
 
+    # Handle metadata file
+    if args.metadata:
+        tool_args.extend(["--metadata", args.metadata])
+    elif args.local:
+        tool_args.extend(["--metadata", str(METADATA_FILE)])
+
     if args.test:
         tool_args.append("--test")