Wire the docker-compose-based tests into CI

[gaurav]

The new .github/workflows/test.yml runs the headless tests: the unit suite plus a loader integration test that starts a real Redis with testcontainers. Two test files are excluded because they use an older harness:

• tests/test_endpoints.py and tests/test_callback.py build and start the full app via tests/conftest.py's session fixture, which shells out to the legacy docker-compose v1 binary (testcontainers==3.6.1 DockerCompose) against docker-compose-test.yml. This needs the full app image built and the v1 CLI, and test_async_query_callback currently errors even locally.

Work to do:

• Port these to a CI-friendly setup (either docker compose v2 / a newer testcontainers, or restructure them to use testcontainers.redis.RedisContainer + an in-process app the way tests/test_loader_integration.py does).
• Deal with the fact that tests/test_norm.py and tests/test_setid.py assign to app.state.* at import time, which makes a full unmarked pytest run order-dependent.
• Then drop the --ignore flags from the CI workflow.

Context: .github/workflows/test.yml, tests/conftest.py, tests/test_loader_integration.py (the pattern to follow).