I need a clean, reliable feed that delivers live Australian horse-racing and greyhound-racing betfair odds with no perceptible lag. The stream must update continuously—not in bursts or at preset intervals—so the data remains actionable right down to jump time. Betfair is my primary source, so I’m after a solution that can pull directly from their API (or another compliant method) and normalise the data into a format that’s easy for my back-end to digest, preferably JSON over REST or WebSocket. If you already have expertise integrating with Betfair’s Exchange API, that will save both of us time; otherwise, be prepared to demonstrate how you’ll keep within their rate limits and compliance guidelines.