Move integration-appropriate tests from tests/unit/ to tests/integration/:
- tests/unit/simple_test.go -> tests/integration/simple_test.go
- tests/unit/deployments/traefik_compose_test.go -> tests/integration/traefik_compose_test.go
- tests/unit/worker_trust_test.go -> tests/integration/worker_trust_test.go
Update test package declarations and imports to reflect new locations.
These tests were misplaced in the unit tests directory but actually test
integration between components or external systems (Traefik, worker trust).
