This one seems to be completely missing. Something wrong with the META.yml here?
The issue is that this dist doesn't include a single indexed package. That's why metacpan is ignoring this one.
In this case, it's a POD-only distro. Shouldn't it still count as something to be indexed?
Well, it's hard to tell what should and what should not be considered a POD-only dist. I guess we could assume something is a pod-only release if it has a valid META file.
Since module names take precedence over pod names, having pod-only dists is kind of dangerous. If some would release a dist which has a DBIx::Class::Manual::SQHackers module that would take precedence and override the pod (although it was released prior, PAUSE doesn't care about .pod).