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/host_vars/adama.yml

@@ -10,3 +10,5 @@ host_apps:
   - { name: dta_service, env: beta, port: 8011 }
   - { name: dta_webapp, env: prod, port: 8080 }
   - { name: dta_webapp, env: beta, port: 8081 }
+  - { name: scha, env: prod, port: 8002 }
+  # optional: - { name: scha, env: beta, port: 8012 }

inventory/host_vars/ai-server-4080.yml

@@ -24,3 +24,4 @@ host_apps:
   - { name: dta_webapp, env: beta, port: 8081 }
   - { name: dta_service, env: prod, port: 8001 }
   - { name: dta_service, env: beta, port: 8011 }
+  - { name: scha, env: prod, port: 8002 }

inventory/host_vars/roslin.yml

@@ -7,3 +7,5 @@ host_apps:
   - { name: dta_service, env: beta, port: 8011 }
   - { name: dta_webapp, env: prod, port: 8080 }
   - { name: dta_webapp, env: beta, port: 8081 }
+  - { name: scha, env: prod, port: 8002 }
+  # optional: - { name: scha, env: beta, port: 8012 }