Method name to classify.
Inferred operation type.
Frodo follows a consistent naming convention where the singular form reads
one object by id or name (readJourney) and the plural form reads all
objects of that type (readJourneys). This function maps the plural form to
the list operation type so policy filtering and tooling can reliably
distinguish single-object reads from collection reads without requiring
explicit per-method metadata.
Infers a normalized operation type from a Frodo method name.