整理配置和代码入口，增加部分测试。

tests/unit/test_project_case_plan.py

@@ -0,0 +1,53 @@
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+import sys
+
+
+def _load_case_module():
+    scripts_dir = Path(__file__).resolve().parents[2] / "scripts"
+    if str(scripts_dir) not in sys.path:
+        sys.path.insert(0, str(scripts_dir))
+    file_path = scripts_dir / "auto_test_domains" / "project_case.py"
+    spec = importlib.util.spec_from_file_location("project_case_for_test", file_path)
+    if spec is None or spec.loader is None:
+        raise RuntimeError(f"Unable to load module from {file_path}")
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_project_case_round_3_focuses_on_stable_readback_fields(monkeypatch, tmp_path: Path) -> None:
+    module = _load_case_module()
+    captured_rounds: dict[str, dict] = {}
+
+    def _fake_run_pipeline_round(**kwargs):
+        captured_rounds[kwargs["round_name"]] = kwargs
+        return {"name": kwargs["round_name"], "passed": True, "issues": []}
+
+    def _fake_build_domain_report(**kwargs):
+        return kwargs
+
+    monkeypatch.setattr(module, "run_pipeline_round", _fake_run_pipeline_round)
+    monkeypatch.setattr(module, "build_domain_report", _fake_build_domain_report)
+
+    module.run_case(config={"project_root": str(tmp_path)}, report_root=tmp_path)
+
+    round_3 = captured_rounds["round_3_investment_update"]
+    expected_fields = round_3["expected_bound_fields"]["remote"]["project"][module.LOCAL_PROJECT_ID]
+    changed_fields = round_3["expected_changes"]["project"][module.LOCAL_PROJECT_ID]
+
+    assert set(changed_fields) == {
+        "investment_decision_capacity",
+        "investment_decision_date",
+        "complete_investment",
+        "dynamic_investment",
+    }
+    assert set(expected_fields.keys()) == {
+        "investment_decision_capacity",
+        "investment_decision_date",
+        "complete_investment",
+        "dynamic_investment",
+    }
+    assert "PUT /project/settlement_investment" in round_3["coverage"]["api"]