Use npm run e2e instead of npx playwright in the smoke container

npx resolved the registry's generic "playwright" package instead of the
locally installed @playwright/test bin, triggering an unwanted fresh install
and "No tests found". npm run e2e uses the project's own node_modules/.bin
unambiguously.

scripts/ci/smoke-qa.sh

@@ -42,6 +42,6 @@ docker run --rm \
   -e "E2E_BASE_URL=$BASE_URL" \
   -v "$CI_ROOT:/work" -w /work/src/admin \
   "mcr.microsoft.com/playwright:v${PW_VERSION}-noble" \
-  npx playwright test
+  npm run e2e
 
 log "smoke-qa.sh complete - QA environment validated end to end"