fix(lab): enforce canonical replay runtime

tests/test_vegetation_shadow_lab.py

@@ -21,11 +21,48 @@ from k1link.laboratory import LaboratoryEvidenceRegistry
 from k1link.laboratory.evidence_report import verify_laboratory_evidence_result
 from k1link.laboratory.vegetation_policy_review import seal_vegetation_policy_review
 from k1link.laboratory.vegetation_shadow_lab import seal_vegetation_shadow_lab
-from k1link.web.vegetation_shadow_lab_api import build_vegetation_shadow_lab_router
+from k1link.web.vegetation_shadow_lab_api import (
+    _route_tgs_anchor_payload,
+    build_vegetation_shadow_lab_router,
+)
 
 REPOSITORY_ROOT = Path(__file__).resolve().parents[1]
 
 
+def test_route_tgs_anchor_payload_preserves_metric_evidence(tmp_path: Path) -> None:
+    path = tmp_path / "tgs-evidence.npz"
+    point_counts = np.arange(1, 11, dtype=np.int64)
+    offsets = np.concatenate(([0], np.cumsum(point_counts)))
+    points = np.arange(int(offsets[-1]) * 3, dtype=np.float32).reshape(-1, 3)
+    centers = np.arange(2244 * 2, dtype=np.float32).reshape(2244, 2) * 0.45
+    states = np.tile(np.arange(2244, dtype=np.uint16) % 4, (10, 1)).astype(np.uint8)
+    z_bounds = np.zeros((10, 2244, 2), dtype=np.float32)
+    z_bounds[..., 0] = np.nan
+    z_bounds[..., 1] = 1.25
+    np.savez(
+        path,
+        source_frame_indices=np.array(
+            [20, 408, 789, 1189, 1609, 1992, 2380, 3190, 4810, 6381],
+            dtype=np.int64,
+        ),
+        current_increment_point_offsets=offsets,
+        current_increment_points_xyz_m=points,
+        costmap_cell_centers_xy_m=centers,
+        causal_rolling_1s_costmap_states=states,
+        causal_rolling_1s_costmap_z_bounds_m=z_bounds,
+    )
+
+    payload = _route_tgs_anchor_payload(path, 409)
+
+    assert payload["schema_version"] == "missioncore.lab-v1-route-tgs-anchor/v1"
+    assert payload["source_sequence"] == 409
+    assert payload["slot"] == 1
+    assert len(payload["current_points_xyz_m"]) == 2
+    assert len(payload["costmap"]["centers_xy_m"]) == 2244
+    assert set(payload["costmap"]["state_codes"]) == {0, 1, 2, 3}
+    assert payload["costmap"]["z_bounds_m"][0] == [None, 1.25]
+
+
 def test_coarse_policy_masks_mark_every_outside_fov_pixel_undefined(
     tmp_path: Path,
     monkeypatch,