Effect renders need a little over 4s, which the 4s primary timeout cut off,
so every avatar with the default effect fell through to an unreachable
public fallback and rendered as a placeholder. Raise the primary budget
above the observed render cost and shorten the fallback budget.
Also stop the proxy from stamping no-store over the avatar and media
responses, so browsers keep the long-lived Cache-Control the route already
sends, and recreate the imaging cache directories with the container user
on every deploy, since root ownership made those cache writes fail
silently.
openhands
Simo