Data class representing a single porch or entrance item for a directory object.
The list of ranges of apartment numbers accessible through this entrance. Typically formatted as string ranges (e.g., "1-50", "51-100").
The numeric identifier of the porch, if applicable (e.g., 1 for "Porch 1"). Null if the porch doesn't use numeric identification.
The display name or identifier for the porch (e.g., "Porch", "Main Entrance").