Move parsing logic from Extended_ast back to Parse_with_comments Re-create Parse_with_comments with the parsing pipeline (Parsed type, Warning50 exception, parse, parse_toplevel) that was absorbed into Extended_ast. Re-export Extended_ast.Parse in the .mli. Update all callers. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>