feat(perception): add bounded reference graph

tests/test_perception_architecture.py

@@ -36,7 +36,7 @@ def test_m4_baseline_is_exact_and_every_local_evidence_digest_resolves() -> None
     verification = verify_m4_baseline(REPOSITORY_ROOT, profile)
     assert verification.source_id == "RAVNOVES00"
     assert verification.session_id == "20260720T065719Z_viewer_live"
-    assert len(verification.verified_paths) == 6
+    assert len(verification.verified_paths) == 10
 
 
 def test_m4_baseline_cannot_silently_select_another_source(tmp_path: Path) -> None:
@@ -82,3 +82,18 @@ def test_new_perception_boundary_has_no_experiment_specific_imports() -> None:
             ):
                 violations[path.name] = module
     assert violations == {}
+
+
+def test_reference_graph_imports_only_an_admitted_compute_primitive() -> None:
+    inventory = validate_reuse_inventory(REUSE_PATH)
+    admitted = {
+        item["module"]
+        for item in inventory["reusable_primitives"]
+        if isinstance(item, dict) and isinstance(item.get("module"), str)
+    }
+    compute_imports = {
+        module
+        for module in _imports(PERCEPTION_ROOT / "graph.py")
+        if module.startswith("k1link.compute")
+    }
+    assert compute_imports <= admitted