refactor(perception): isolate detector runtime

tests/test_perception_architecture.py

@@ -19,6 +19,20 @@ REPOSITORY_ROOT = Path(__file__).resolve().parents[1]
 PERCEPTION_ROOT = REPOSITORY_ROOT / "src" / "k1link" / "perception"
 BASELINE_PATH = REPOSITORY_ROOT / "config" / "perception" / "m4-recorded-realtime-baseline-v1.json"
 REUSE_PATH = REPOSITORY_ROOT / "config" / "perception" / "m4-reuse-inventory-v1.json"
+DETECTOR_RUNTIME_MODULES = (
+    "__init__.py",
+    "baseline.py",
+    "contracts.py",
+    "detector.py",
+    "detector_replay.py",
+    "detector_replay_cli.py",
+    "detector_replay_contracts.py",
+    "detector_replay_result.py",
+    "detector_replay_validation.py",
+    "providers.py",
+    "recorded_source.py",
+    "yolox_object_detector.py",
+)
 
 
 def _imports(path: Path) -> set[str]:
@@ -151,6 +165,22 @@ def test_perception_contracts_import_no_compute_lab_graph_or_web_module() -> Non
     assert forbidden == set()
 
 
+def test_perception_package_initializer_is_side_effect_free() -> None:
+    assert _imports(PERCEPTION_ROOT / "__init__.py") == set()
+
+
+def test_detector_runtime_closure_imports_no_legacy_compute_package() -> None:
+    violations = {
+        name: sorted(
+            module
+            for module in _imports(PERCEPTION_ROOT / name)
+            if module.startswith("k1link.compute")
+        )
+        for name in DETECTOR_RUNTIME_MODULES
+    }
+    assert {name: modules for name, modules in violations.items() if modules} == {}
+
+
 def test_new_perception_boundary_has_no_experiment_specific_imports() -> None:
     violations: dict[str, str] = {}
     for path in PERCEPTION_ROOT.glob("*.py"):