Competitions Index

Distinct competitions across editions (name + tour), with edition counts and year span.

A 'competition' here is the recurring event (e.g. Wimbledon), whereas /tournaments lists individual yearly editions.

Each item carries an id: the most recent real tournament_id sharing that exact name+tour, so a caller (or the MCP's resolve_entity, which reads this route for tennis tournament search) always gets a usable, chainable id -- never a bare name with nothing to look up next.