Monorepo for Aesthetic.Computer aesthetic.computer

chore(at): bump @atproto/api to ^0.19.4, migrate BskyAgent → AtpAgent master

- Align @atproto/api across all three package.json files (root, system/, at/) - Replace deprecated BskyAgent with AtpAgent in 12 .mjs files - Add at/cli.mjs — unified AT Protocol CLI (ac-at) - Add PDS contact email (mail@aesthetic.computer) to pds.env.example - Include AT Protocol integration audit report Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>