message: Add support for block profiles
  Summary: Also look for block profiles (currently `ColdStart` only) in packed profiles.
diff: @@ -1001,6 +1001,24 @@ def _handle_profiles(args, debug_mode):
  else:
  logging.info("No method profiles found in %s", args.packed_profiles)
  + # Create input for basic blocks.
  + # Note: at the moment, only look for ColdStart.
  + block_profiles_str = ", ".join(
  + f'"{f.path}"'
  + for f in os.scandir(directory)
  + if f.is_file()
  + and f.name.startswith("block_profiles_")
  + and "ColdStart" in f.name
  + )
  + if block_profiles_str:
  + logging.debug("Found block profiles: %s", block_profiles_str)
  + # Assume there's at most one.
  + args.passthru.append(
  + f"InsertSourceBlocksPass.profile_file={block_profiles_str}"
  + )
  + else:
  + logging.info("No block profiles found in %s", args.packed_profiles)
  +
  def prepare_redex(args):
  logging.debug("Preparing...")
  