Add integration-test-service workflow

[qtomlinson]

Adds a new GitHub Actions workflow (integration-test-service.yml) that runs npm run e2e-test-service on a daily schedule.

What it does:

• Runs unit tests (npm test) before the e2e tests
• Guards against running on forks — exits early if the repository is not clearlydefined/operations
• Runs e2e-test-service with DYNAMIC_COORDINATES=false
• Always runs cleanup via e2e-test-service-cleanup after the test
• Fails the job if the service test failed

Triggers:

• Daily at 2:00am UTC (scheduled)
• Manually via workflow_dispatch