Auto-start monica_site dj-queue worker on adama (#18)

## Summary
- Closes [#17](#17).
- Django deploy passes optional `host_apps.compose_profiles` as `COMPOSE_PROFILES` so compose profiles survive `up -d --remove-orphans`.
- Adama `monica_site` beta+prod set `compose_profiles: [worker]` (dj-queue singleton). Roslin / ai-server-4080 stay web-only.

## Why
Real campaign sends enqueue dj-queue tasks; without the worker they stay **Queued**. Test email worked because it is synchronous SMTP.

## Test plan
- [ ] Merge + deploy `monica_site` beta (and/or prod) via `deploy.sh`
- [ ] On **adama**, confirm worker container up for `monica_site_beta` / `monica_site_prod`
- [ ] On roslin / ai-server-4080, confirm **no** worker
- [ ] Portal: send campaign → recipient leaves Queued → SentReviewed-on: #18

roles/app-deploy/tasks/django.yml

@@ -100,6 +100,9 @@
     - _legacy_systemd | default('') | length > 0
     - _legacy_systemd_probe.stdout | default('') | length > 0
 
+# Optional host_apps.compose_profiles (e.g. [worker]) activates compose profiles
+# on this host only. Used for monica_site dj-queue singleton on adama — without
+# it, plain up --remove-orphans can drop a manually started worker.
 - name: "django[{{ _project }}] start containers"
   ansible.builtin.command:
     cmd: "docker compose -f {{ _spec.compose_file }} --env-file .env up -d --remove-orphans"
@@ -107,6 +110,7 @@
   environment:
     COMPOSE_PROJECT_NAME: "{{ _project }}"
     WEB_PORT: "{{ app_item.port }}"
+    COMPOSE_PROFILES: "{{ (app_item.compose_profiles | default([])) | join(',') }}"
   become: true
   become_user: "{{ admin_user }}"
   changed_when: true