refactor: consolidate throwIfAborted + fix isCompactionFailureError (#12463)

* refactor: consolidate throwIfAborted in outbound module

- Create abort.ts with shared throwIfAborted helper

- Update deliver.ts, message-action-runner.ts, outbound-send-service.ts

* fix: handle context overflow in isCompactionFailureError without requiring colon

scripts/analyze_code_files.py

@@ -157,7 +157,7 @@ def find_duplicate_functions(files: List[Tuple[Path, int]], root_dir: Path) -> D
 
 def main():
     parser = argparse.ArgumentParser(
-        description='List the longest and shortest code files in a project'
+        description='Analyze code files: list longest/shortest files, find duplicate function names'
     )
     parser.add_argument(
         '-t', '--threshold',