feat(E04): 3D 결과 열쇠에 조건 · 옛 이름 읽기 · 엔진 판 = 엔진 파일 해시 (PLAN 564-2)

- section_key(start, end, condition) → 0.00_100.00_dry 꼴 · 건기 → 우기가 서로 덮지 않음
- 옛 시작_끝.json 은 그 안 조건 열쇠로 읽음(load · saved_summaries)
- ENGINE_VERSION 대신 engine_hash()(엔진 파일 넷 해시) — 판 올리기 잊음 없음
- 시험 533_3 router(건기 → 우기 둘 다 남음 · 옛 이름 · 엔진 해시) · 534_3 견본 파일 새 이름

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

resources/tester/test_533_3_e04_router.py

@@ -107,7 +107,7 @@ def test_analyze_cached_force_and_result(client, project, monkeypatch):
 
     monkeypatch.setattr(run, "run_engine", counted)
     first = client.post(f"/api/projects/{PID}/stab/analyze3d", json=BODY).json()
-    assert first == {"status": "accepted", "key": "0.00_100.00"}
+    assert first == {"status": "accepted", "key": "0.00_100.00_dry"}
     done = _wait(client)
     assert done["error"] is None and done["percent"] == 100
     assert done["summary"]["cells"] == 5 and done["summary"]["verdict"] == "ng"
@@ -133,7 +133,7 @@ def test_analyze_cached_force_and_result(client, project, monkeypatch):
     _wait(client)
     assert len(calls) == 3
 
-    doc = client.get(f"/api/projects/{PID}/stab/result3d", params={"key": "0.00_100.00"}).json()
+    doc = client.get(f"/api/projects/{PID}/stab/result3d", params={"key": "0.00_100.00_dry"}).json()
     grid = doc["grid"]
     assert len(doc["f"]) == len(doc["z"]) == len(doc["v"]) == grid["nx"] * grid["ny"]
     f = np.array([np.nan if v is None else v for v in doc["f"]])
@@ -143,7 +143,7 @@ def test_analyze_cached_force_and_result(client, project, monkeypatch):
     assert doc["stale"] is False
 
     over = client.get(f"/api/projects/{PID}/stab/result3d").json()
-    assert [s["key"] for s in over["saved"]] == ["0.00_100.00"] and over["editable"] is True
+    assert [s["key"] for s in over["saved"]] == ["0.00_100.00_dry"] and over["editable"] is True
     assert len(over["line"]) == len(STATIONS) and over["sections"][0]["end_m"] == 100.0
     # E02 지반을 바꾸면 저장본이 「옛 것」
     (project / "E02_StabGround").mkdir()
@@ -179,7 +179,9 @@ def test_cancel_and_restart(client, monkeypatch):
     body = _wait(client)
     assert body["cancelled"] is True and body["error"] is None
     assert (
-        client.get(f"/api/projects/{PID}/stab/result3d", params={"key": "0.00_100.00"}).status_code
+        client.get(
+            f"/api/projects/{PID}/stab/result3d", params={"key": "0.00_100.00_dry"}
+        ).status_code
         == 404
     )
     # 다시 시작
@@ -191,6 +193,39 @@ def test_cancel_and_restart(client, monkeypatch):
     assert body["cancelled"] is False and body["percent"] == 100
 
 
+def test_dry_then_wet_both_kept(client, project, monkeypatch):
+    """건기 → 우기 = 다른 열쇠 · 앞 결과가 덮이지 않음 · 옛 이름(조건 없음) 파일도 읽음."""
+    monkeypatch.setattr(run, "run_engine", _fake_engine)
+    for condition in ("dry", "wet"):
+        body = client.post(
+            f"/api/projects/{PID}/stab/analyze3d", json={**BODY, "condition": condition}
+        ).json()
+        assert body == {"status": "accepted", "key": f"0.00_100.00_{condition}"}
+        _wait(client)
+    over = client.get(f"/api/projects/{PID}/stab/result3d").json()
+    assert [(s["key"], s["condition"]) for s in over["saved"]] == [
+        ("0.00_100.00_dry", "dry"),
+        ("0.00_100.00_wet", "wet"),
+    ]
+    folder = run.results_dir(project)
+    # 옛 이름 — 우기 파일을 조건 없는 이름으로 옮기면 우기 열쇠로 읽힘
+    (folder / "0.00_100.00_wet.json").rename(folder / "0.00_100.00.json")
+    over = client.get(f"/api/projects/{PID}/stab/result3d").json()
+    assert [s["key"] for s in over["saved"]] == ["0.00_100.00_dry", "0.00_100.00_wet"]
+    url = f"/api/projects/{PID}/stab/result3d"
+    assert client.get(url, params={"key": "0.00_100.00_wet"}).json()["stale"] is False
+    again = client.post(
+        f"/api/projects/{PID}/stab/analyze3d", json={**BODY, "condition": "wet"}
+    ).json()
+    assert again["status"] == "cached"
+
+
+def test_engine_hash_in_fingerprint(monkeypatch):
+    before = run.fingerprint("a", None, {})
+    monkeypatch.setattr(run, "engine_hash", lambda: "changed")
+    assert run.fingerprint("a", None, {}) != before
+
+
 def test_bad_requests(client):
     url = f"/api/projects/{PID}/stab/analyze3d"
     assert client.post(url, json={"start_m": 100, "end_m": 50}).status_code == 400

resources/tester/test_534_3_e05_report.py

@@ -170,7 +170,7 @@ def project(tmp_path, monkeypatch) -> Path:
     path.write_text(json.dumps(ground), encoding="utf-8")
     r3 = root / "E04_Stab3D" / "results"
     r3.mkdir(parents=True)
-    (r3 / "0.00_200.00.json").write_text(
+    (r3 / "0.00_200.00_wet.json").write_text(
         json.dumps(
             {
                 "fingerprint": "3d-1",