feat(561-2): D 예정노선 지형 격자 2 m · B 공용 1 m 그대로 (grid_m 인자)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

resources/tester/test_530_1_plan_terrain.py

@@ -45,8 +45,9 @@ def fake(tmp_path, monkeypatch):
         (output_dir / "vworld_satellite_meta.json").write_text(json.dumps(meta), "utf-8")
         return output_dir / "vworld_satellite.png"
 
-    def dem(root, processed, models_dir, route_xy, crs, methods=None):
+    def dem(root, processed, models_dir, route_xy, crs, methods=None, grid_m=None):
         seen["dem"].append((models_dir.name, route_xy.tolist(), crs))
+        seen["grid_m"] = grid_m
         return [{"model_file_path": f"B04_PreProcess/{models_dir.name}/dtm.npz"}]
 
     monkeypatch.setattr(store_mod, "download_sheet", download_sheet)
@@ -108,9 +109,10 @@ def test_extent_no_download_and_covered(fake) -> None:
     assert seen["download"] == [] and before["have"] is None and before["covered"] is False
     assert before["margin_m"] == terrain.DEFAULT_MARGIN_M and len(before["box"]) == 4
     x0, y0, x1, y1 = before["box_m"]
-    assert before["cells"] == int((x1 - x0) * (y1 - y0))
+    assert before["cells"] == int((x1 - x0) * (y1 - y0) / 4)  # D 지형 격자 2 m
     assert all(not s["stored"] and len(s["ring"]) == 4 for s in before["sheets"])
     terrain.ensure_plan_terrain(root, [A, B], EPSG)
+    assert seen["grid_m"] == 2.0  # B 공용 1 m 가 아니라 D 전용 값
     after = terrain.plan_extent(root, [A, B], EPSG)
     assert after["covered"] and after["have_m"] == after["box_m"]
     assert all(s["stored"] for s in after["sheets"])