chore(docker): explicitly override ports to prevent merging

Update `docker-compose.override.yml` to use the `!override` tag on the `ports` configuration for `message-queue`, `database`, and `infrahub-server`.

This change ensures that Docker Compose replaces the ports list rather than merging it with the base configuration, strictly preventing these services from exposing ports.

docker-compose.override.yml

@@ -18,13 +18,13 @@ services:
 
   # === Infrahub ===  
   message-queue:
-    ports:
+    ports: !override
       []
   database:
-    ports:
+    ports: !override
       []
   infrahub-server:
-    ports:
+    ports: !override
       []
 
 volumes: