Pin an exact released image tag. The previous pin :0.4 is a moving tag
that upstream now republishes with main-branch builds (currently
@atproto/pds 0.5.1 on Node 24, where the service entrypoint moved from
/app/index.js to /app/index.ts), so the recipe's entrypoint.sh
(exec node --enable-source-maps index.js) crash-loops MODULE_NOT_FOUND.
ghcr.io/bluesky-social/pds:0.4.219 is the newest released exact tag and
keeps the layout this recipe's entrypoint expects (Node 20.20,
/app/index.js, dumb-init).
