Lazy loading and better errors, courtesy of sherbang in 22
Attachment download streaming, courtesy of fundthmcalculus in 29
Various API model validation fixes, courtesy of Yoshify
Note that 0.6.0 and 0.6.0.1 (version on PyPi) are the same version - a hiccup in the publish workflow required a new and unique version number, so I tacked on a .1 😅