Tree-sitter AST → entity extraction

[seojeongm]

Summary

Parse a single .py file with Tree-sitter and extract file, class, base_class, function, param entities with correct ID generation (path::parent::child).

Tasks

• Tree-sitter parser setup (tree-sitter-python grammar loading)
• File-level entity extraction (file_name, path, loc)
• Class node extraction (class_name, start/end line)
• Base class list extraction from class arguments
• Function/method extraction (nesting_depth, is_async, start/end line, parent_type)
• Parameter extraction from function signatures
• ID generation via ts_node_parent upward traversal
• ERROR node skip logic (continue on syntax errors)