Stop legacy dta_service systemd units before Docker deploy (#52).

ai-server-4080 runs dta_service active/active with adama and roslin.
Disable beta_dta_wsgi/prod_dta_wsgi so port 8001/8011 are free for compose.

Co-authored-by: Cursor <cursoragent@cursor.com>

inventory/group_vars/all.yml

@@ -54,6 +54,10 @@ app_catalog:
     compose_file: docker-compose.prod.yml
     web_service: web
     migrate_cmd: "uv run python manage.py migrate --noinput"
+    # Pre-docker deploy used venv + systemd on each host; stop before compose up.
+    legacy_systemd_units:
+      beta: beta_dta_wsgi
+      prod: prod_dta_wsgi
   dta_webapp:
     type: node-static
     repo: "{{ git_base_url }}/Ditch_The_Agent/dta_webapp.git"

inventory/host_vars/ai-server-4080.yml

@@ -13,7 +13,8 @@ act_runner_enabled: true
 # passphrase-less deploy key here instead.
 gitea_key_path: "/home/{{ admin_user }}/.ssh/gitea_deploy"
 
-# company_site prod runs here for side testing.
+# company_site + dta_webapp + dta_service for side testing and active/active.
+# Ports MUST match adama/roslin so NPM can balance all three upstreams.
 host_apps:
   - { name: company_site, env: prod, port: 8000 }
   - { name: dta_webapp, env: prod, port: 8080 }