chore: use different ports in example docker-compose files

Avoid port conflicts when running multiple examples:
- dirty_example: 8001
- embedding_service: 8002
- celery_alternative: 8003

examples/celery_alternative/docker-compose.yml

@@ -15,7 +15,7 @@ services:
       context: ../..  # Gunicorn repo root
       dockerfile: examples/celery_alternative/Dockerfile
     ports:
-      - "8000:8000"
+      - "8003:8000"
     environment:
       - GUNICORN_WORKERS=4
       - DIRTY_WORKERS=9

examples/embedding_service/docker-compose.yml

@@ -4,7 +4,7 @@ services:
       context: ../..
       dockerfile: examples/embedding_service/Dockerfile
     ports:
-      - "8000:8000"
+      - "8002:8000"
     healthcheck:
       test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8000/health', timeout=5)"]
       interval: 10s