Following up from the diaSource sprint, we should explore adding `*CenterAll` flags during detect and measure (see PixelFlags.cc) for sources where the given bit (e.g. interpolated or saturated) is set for every pixel in the 3x3 center of the footprint. This contrasts with the existing `*Center` flag that is for any pixel in the center having that bit set.

Once we set this flag, we should be able to use it to entirely reject classes of bad sources before any measurement plugins are run on them. For example, if all central pixels are interpolated, there is no real source there.