Add blocked treebank tracking to metadata generation

- Read tools/blocked_treebanks.yaml during metadata collection
- Add "blocked" property to each treebank in metadata:
- True if treebank is in blocked_treebanks.yaml
- False otherwise
- Log when treebanks are marked as blocked with reason

This allows downstream tools to check the metadata for blocked
status without needing to separately load the YAML file.

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

tools/02_traverse_ud_repos.py

@@ -70,6 +70,7 @@ def extract_metadata(file_path) -> {}:
         "iso3": None,       #   iso3: deu
         "family": None,     #   family: IE
         "genus": None,      #   genus: Germanic
+        "blocked": None,    #   blocked: True|False
         # "splits": None,      # {"train":  {"files": []},
                                #  "dev":    {"files": []},
                                #  "test":   {"files": []},
@@ -254,6 +255,30 @@ def traverse_directory(directory):
 if __name__ == '__main__':
     directory = 'UD_repos'
     results = traverse_directory(directory)
+
+    # Load blocked treebanks and add "blocked" property
+    blocked_treebanks_file = Path('blocked_treebanks.yaml')
+    if blocked_treebanks_file.exists():
+        with open(blocked_treebanks_file, 'r') as fh:
+            blocked_data = yaml.safe_load(fh)
+            if blocked_data:
+                blocked_treebanks = {k: v for k, v in blocked_data.items() if v is not None}
+                for name in results.keys():
+                    if name in blocked_treebanks:
+                        results[name]["blocked"] = True
+                        logging.info(f"Marked {name} as blocked: {blocked_treebanks[name]['reason']}")
+                    else:
+                        results[name]["blocked"] = False
+            else:
+                # No blocked treebanks, mark all as not blocked
+                for name in results.keys():
+                    results[name]["blocked"] = False
+    else:
+        logging.warning(f"Blocked treebanks file not found: {blocked_treebanks_file}")
+        # Mark all as not blocked if file doesn't exist
+        for name in results.keys():
+            results[name]["blocked"] = False
+
     for name, metadata in results.items():
         print(f"Directory: {metadata['dirname']}")
         # print(metadata)