fix: CI: use different stage name for integration tests

.woodpecker.yml

@@ -5,12 +5,12 @@ steps:
       - apt update
       - apt-get install -y --no-install-recommends protobuf-compiler
       - cargo build
-      - cargo test
+      - cargo test --lib
       #      - make migrate
       #      - make
       #      - make release
         #      - make test // requires Docker-in-Docker
-  backend:
+  integration_tests:
     image: python
     commands:
       - pip install -r requirements.txt