Root cause: test_schemathesis.py mutates decnet.web.auth.SECRET_KEY at
module-level import time, poisoning JWT verification for all other tests
in the same process — even when fuzz tests are deselected.
- Add pytest_ignore_collect hook in tests/api/conftest.py to skip
collecting test_schemathesis.py unless -m fuzz is selected
- Add --dist loadscope to addopts so xdist groups by module (protects
module-scoped fixtures in live tests)
- Remove now-unnecessary xdist_group markers from live test classes
- Add 403 response to all RBAC-gated endpoints (schemathesis UndefinedStatusCode)
- Add 400 response to all endpoints accepting JSON bodies (malformed input)
- Add required 'title' field to schemathesis.toml for schemathesis 4.15+
- Add xdist_group markers to live tests with module-scoped fixtures to
prevent xdist from distributing them across workers (fixture isolation)
9 tests covering auth enforcement, component reporting, status
transitions, degraded mode, and real DB/Docker state validation.
Runs with -m live alongside other live service tests.
