There are any number of amazing Portland startups. (Clearly. That’s why I’ve been writing about them on this blog for nearly a dozen years.) But every once in a while, a startup comes along that becomes the center of gravity — the proverbial Cinderella story — for a generation of startups around here. Cloudability was very much one of those startups. And today, the denouement of that startup story begins, in the best of ways, with an exit. Cloudability has announced an agreement to be acquired by Apptio.