fix: add Playwright, Valkey, and mock-OIDC to CI pipelines

- Add valkey and mock-oidc services to both release and dev workflows
- Install Playwright with Chromium deps for headless e2e tests
- Set WG_REDIS_URL and MOCK_OIDC_HOST env vars for CI
- Make mock OIDC discovery URL configurable via MOCK_OIDC_HOST env var
- Add full test job (unit + e2e) to dev pipeline before Docker build

tests/e2e/test_idp_seed.py

@@ -22,7 +22,8 @@ from wiregui.models.configuration import Configuration
 from tests.e2e.conftest import FAKE_SERVER_KEY
 
 
-MOCK_OIDC_DISCOVERY = "http://localhost:9000/test-idp/.well-known/openid-configuration"
+MOCK_OIDC_HOST = os.environ.get("MOCK_OIDC_HOST", "localhost")
+MOCK_OIDC_DISCOVERY = f"http://{MOCK_OIDC_HOST}:9000/test-idp/.well-known/openid-configuration"
 
 # Separate port for the IdP-seeded app instance
 IDP_APP_PORT = 13002