is_binary_file (main)

Checks if a file is binary by detecting null bytes in its initial block, treating read errors as binary.

def is_binary_file(path: Path, block_size: int = 1024) -> bool:
    """Returns True if the file contains null bytes in its initial block."""
    try:
        with open(path, "rb") as f:
            return b"\x00" in f.read(block_size)
    except OSError:
        return True