Provider proposal: Gondola, with Kling 3 Pro from $0.23 per 5s

[Codonyat]

OpenMontage already routes video through fal, the official APIs and Runway, and I'd like to add Gondola, which I run, as one more BYO-key route. Kling 3 Pro with audio starts at $0.23 per 5s there, under a third of fal's per-second rate, and MiniMax H3 at $0.15 per 6s, behind one key on a quote, queue and retrieve REST API. The quote step returns a job's exact price before it runs. The prices are low because Venice AI stakers receive inference credit every day and sell whatever they won't use through Gondola before it lapses.

Would you accept a PR for it?