Add abc_voice beta container on port 8020 (#39)

## Summary
- Register `abc_voice` as a second container from `GIS/abc_worker` (`docker-compose.voice.yml`), beta port **8020** on adama, roslin, starbuck, apollo, and ai-server-4080.
- Document `https://beta.abc.voice.aimloperations.com` and `~/Documents/secrets/abc_voice/abc_voice_beta.env`. Ansible does not create the NPM host.
- Closes #38.

## Test plan
- [ ] Create the secret file (copy the worker beta env, set `VOICE_ENABLED=true`, Cartesia, and LiveKit) before the first deploy
- [ ] `deploy.sh --app abc_voice --env beta` after the worker compose file is on `Development`
- [ ] NPM: `beta.abc.voice.aimloperations.com` → `:8020` on all five hosts
- [ ] `abc_be` `WORKER_AV_URL=https://beta.abc.voice.aimloperations.com`

Merge this before the abc_worker workflow PR, or that deploy step fails looking up `abc_voice`.

Reviewed-on: #39

inventory/host_vars/adama.yml

@@ -31,5 +31,6 @@ host_apps:
   - { name: print_forge, env: beta, port: 8019, compose_profiles: [worker], enabled: false }
   - { name: abc_be, env: beta, port: 8017 }
   - { name: abc_worker, env: beta, port: 8018 }
+  - { name: abc_voice, env: beta, port: 8020 }
   - { name: abc_fe, env: beta, port: 8085 }
   - { name: livekit, env: beta, port: 7880 }