refactor(perception): decouple replay from lab layout

tests/test_perception_architecture.py

@@ -12,6 +12,7 @@ from k1link.perception.baseline import (
     load_m4_baseline,
     validate_reuse_inventory,
     verify_m4_baseline,
+    verify_m4_execution_source,
 )
 
 REPOSITORY_ROOT = Path(__file__).resolve().parents[1]
@@ -39,6 +40,61 @@ def test_m4_baseline_is_exact_and_every_local_evidence_digest_resolves() -> None
     assert len(verification.verified_paths) == 10
 
 
+def test_worker_execution_source_verification_needs_no_historical_lab_tree() -> None:
+    profile = load_m4_baseline(BASELINE_PATH)
+    camera_root = (
+        REPOSITORY_ROOT
+        / ".runtime/compute-jobs/recorded-camera-602ac89026ed12978619801d"
+        / "input/camera/sensor.camera.right/epoch-1"
+    )
+    pack_root = (
+        REPOSITORY_ROOT
+        / ".runtime/compute-experiments/e10/lidar-packs"
+        / "e10-lidar-pack-576c994a6c814e2592dd6240ace3902a5db94843312c759a73ba0c9166157d2b"
+    )
+
+    verified = verify_m4_execution_source(
+        profile,
+        camera_summary_path=camera_root / "summary.json",
+        camera_index_path=camera_root / "index.jsonl",
+        source_pack_manifest_path=pack_root / "manifest.json",
+        source_pack_path=pack_root / "lidar-pack.npz",
+    )
+
+    assert tuple(path.name for path in verified) == (
+        "summary.json",
+        "index.jsonl",
+        "manifest.json",
+        "lidar-pack.npz",
+    )
+
+
+def test_worker_execution_source_rejects_rewritten_manifest_bytes(tmp_path: Path) -> None:
+    profile = load_m4_baseline(BASELINE_PATH)
+    camera_root = (
+        REPOSITORY_ROOT
+        / ".runtime/compute-jobs/recorded-camera-602ac89026ed12978619801d"
+        / "input/camera/sensor.camera.right/epoch-1"
+    )
+    pack_root = (
+        REPOSITORY_ROOT
+        / ".runtime/compute-experiments/e10/lidar-packs"
+        / "e10-lidar-pack-576c994a6c814e2592dd6240ace3902a5db94843312c759a73ba0c9166157d2b"
+    )
+    rewritten_manifest = tmp_path / "manifest.json"
+    document = json.loads((pack_root / "manifest.json").read_text("utf-8"))
+    rewritten_manifest.write_text(json.dumps(document), "utf-8")
+
+    with pytest.raises(BaselineContractError, match="manifest file digest"):
+        verify_m4_execution_source(
+            profile,
+            camera_summary_path=camera_root / "summary.json",
+            camera_index_path=camera_root / "index.jsonl",
+            source_pack_manifest_path=rewritten_manifest,
+            source_pack_path=pack_root / "lidar-pack.npz",
+        )
+
+
 def test_m4_baseline_cannot_silently_select_another_source(tmp_path: Path) -> None:
     document = json.loads(BASELINE_PATH.read_text("utf-8"))
     incompatible = copy.deepcopy(document)