Register monica_site for django deploy (closes #14) (#15)

## Summary
- Closes [#14](#14).
- Register `monica_site` in `app_catalog` (`type: django`, repo `ai_ml_operations/monica_site`, default branch `main`) and `host_apps` on **adama**, **roslin**, and **ai-server-4080** (prod **8004**, beta **8014**).
- Document NPM (`mkdrealtor.com` / `monica-preview.aimloperations.com`), Postgres DBs (`monica_site` / `monica_site_beta`), and **dj-queue worker singleton on adama** only (`compose --profile worker`).
- List `monica_site` in `scripts/deploy.sh` `--app` help.

## Out of scope (manual ops)
- Create Postgres DBs + grants on `10.0.0.230`
- Control-node secrets under `~/Documents/secrets/monica_site/`
- NPM proxy hosts (Ryan)
- First deploy smoke + worker start on adama

## Test plan
- [ ] Confirm inventory YAML parses (`ansible-inventory --list` or dry deploy)
- [ ] Create DBs `monica_site` / `monica_site_beta` + secrets before smoke deploy
- [ ] `./scripts/deploy.sh --app monica_site --env beta --ref main`
- [ ] `./scripts/deploy.sh --app monica_site --env prod --ref main`
- [ ] On **adama** only: `docker compose -f docker-compose.prod.yml --profile worker up -d`
- [ ] Hit `/healthz/` on beta + prod; prod under-construction holding pageReviewed-on: #15

scripts/deploy.sh

@@ -17,7 +17,7 @@ Deploy applications with deploy-apps.yml.
   HOST              Optional. Limit to one host: adama, roslin, or ai-server-4080.
 
 Options:
-  --app NAME        App to deploy (company_site, dta_service, dta_webapp, scha, chat_web_app, chat_backend)
+  --app NAME        App to deploy (company_site, dta_service, dta_webapp, scha, chat_web_app, chat_backend, monica_site)
   --env ENV         Environment: beta or prod
   --ref REF         Git ref/sha to deploy (default: master)
   --check           Dry run