Represents a field path through FK relationships, using dot notation.
Examples:
"name" — direct field on the entity
"name"
"contactPerson.firstName" — FK traversal to related entity's field
"contactPerson.firstName"
Builds a path from a dot-notation string such as "contactPerson.firstName".
The full dot-notation path string.
The ordered path segments, e.g. ["contactPerson", "firstName"].
["contactPerson", "firstName"]
Returns the dot-notation path string.