Register scha for deploy on all webservers (scha#19 Part B) (#3)

## Summary
- Register `scha` in `app_catalog` and `host_apps` on adama, roslin, and ai-server-4080 (prod port **8002**; beta **8012** reserved).
- Update `IMPLEMENTATION.md` ports, apps, Postgres, and NPM tables so every app lists beta + prod.
- Include `scha` in `deploy.sh` help.

Part A (dockerize / CI in the `scha` repo) is tracked separately in [scha#19](ai_ml_operations/scha#19).

## Test plan
- [ ] Confirm inventory YAML loads: `ansible-inventory --list` shows `scha` under each host
- [ ] After Part A merges + `~/Documents/secrets/scha/scha_prod.env` exists: dry-run `./scripts/deploy.sh --app scha --env prod --check`
- [ ] Create DB `scha` on shared Postgres (`10.0.0.230`) and point NPM at `adama:8002` + `roslin:8002` (+ optional `ai-server-4080:8002`)

Reviewed-on: #3

inventory/group_vars/all.yml

@@ -80,6 +80,13 @@ app_catalog:
     webroot_pattern: "/var/www/{env}.app.ditchtheagent/html"
     # deploy runs `npm ci` then `npm run build:<env>`; that script writes to
     # {{ web_static_root }}/<env>_dta_webapp (beta/prod), served by web-static.
+  scha:
+    type: django
+    repo: "{{ git_base_url }}/ai_ml_operations/scha.git"
+    default_branch: master
+    compose_file: docker-compose.prod.yml
+    web_service: web
+    migrate_cmd: "uv run python manage.py migrate --noinput"
 
 # Deploy filter vars. CI passes these; manual runs may leave them undefined
 # to (re)deploy every app listed in the host's host_apps.