Add test runner dashboard service (test.rose-ash.com)

Public Quart microservice that runs pytest against shared/tests/ and
shared/sexp/tests/, serving an HTMX-powered sexp-rendered dashboard
with pass/fail/running status, auto-refresh polling, and re-run button.
No database — results stored in memory.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -35,6 +35,7 @@ x-app-env: &app-env
   APP_URL_ORDERS: https://orders.rose-ash.com
   APP_URL_RELATIONS: http://relations:8000
   APP_URL_LIKES: http://likes:8000
+  APP_URL_TEST: https://test.rose-ash.com
   APP_URL_ARTDAG: https://celery-artdag.rose-ash.com
   APP_URL_ARTDAG_L2: https://artdag.rose-ash.com
   INTERNAL_URL_BLOG: http://blog:8000
@@ -46,6 +47,7 @@ x-app-env: &app-env
   INTERNAL_URL_ORDERS: http://orders:8000
   INTERNAL_URL_RELATIONS: http://relations:8000
   INTERNAL_URL_LIKES: http://likes:8000
+  INTERNAL_URL_TEST: http://test:8000
   INTERNAL_URL_ARTDAG: http://l1-server:8100
   AP_DOMAIN: federation.rose-ash.com
   AP_DOMAIN_BLOG: blog.rose-ash.com
@@ -201,6 +203,17 @@ services:
       RUN_MIGRATIONS: "true"
       WORKERS: "1"
 
+  test:
+    <<: *app-common
+    image: registry.rose-ash.com:5000/test:latest
+    build:
+      context: .
+      dockerfile: test/Dockerfile
+    environment:
+      <<: *app-env
+      REDIS_URL: redis://redis:6379/9
+      WORKERS: "1"
+
   db:
     image: postgres:16
     environment: