Get historical odds timeline for a fixture.
Lookup mode: required fixtureId + (bookmaker required when oddsIds is not provided) OR oddsIds.
Your API key (query-based auth for v5).
Single fixture ID (e.g. id1400003160574219).
Single bookmaker slug. RULE: If oddsIds is NOT provided, you must pass exactly ONE bookmaker.
Optional: comma/space-separated oddsIds to restrict the response.
Returns FixtureHistoricalOddsResponse (fixture meta + time-series odds)