Member Address
class MemberAddress(var line1: String? = null, var line2: String? = null, var city: String? = null, var state: String? = null, var zipCode: String? = null)
MemberAddress — normalized physical address for a member.
Used by MemberProfile for profile data. Every field is nullable; validate formats according to tenant/locale (e.g., 2-letter state codes, 5-digit US ZIP).