fix: add tests service alias for standalone repo workflow compatibility

The package-local master.yml workflow references docker compose service
'tests' which was removed in the docker-compose consolidation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: zajca

docker-compose.yml

@@ -1,5 +1,5 @@
 services:
-  dev:
+  dev: &dev
     build:
       context: ../..
       dockerfile: Dockerfile
@@ -8,6 +8,10 @@ services:
     volumes:
       - ./:/code
 
+  # Alias for standalone repo workflow compatibility
+  tests:
+    <<: *dev
+
   dev-xdebug:
     build:
       context: ../..