chore(alembic): merge comparison_milestone 和 savings_report_fields 两个 head (#11)

Co-authored-by: OuYingJun1024 <1034284404@qq.com>
Reviewed-on: #11
Co-authored-by: ouzhou <ouzhou@wonderable.ai>
Co-committed-by: ouzhou <ouzhou@wonderable.ai>

tests/test_compare_record.py

@@ -33,7 +33,7 @@ def _food_payload(trace_id: str) -> dict:
         ],
         "comparison_results": [
             {"platform_id": "meituan", "platform_name": "美团", "package": "com.sankuai.meituan",
-             "price": 123.50, "is_source": False, "rank": 1},
+             "price": 123.50, "is_source": False, "rank": 1, "coupon_saved": 7.0},
             {"platform_id": "taobao_flash", "platform_name": "淘宝闪购", "package": "com.taobao.taobao",
              "price": 128.50, "is_source": True, "rank": 2},
             {"platform_id": "jd_waimai", "platform_name": "京东外卖", "package": "com.jingdong.app.mall",
@@ -78,6 +78,18 @@ def test_report_and_derive(client) -> None:
     assert d["raw_payload"]["trace_id"] == "trace-1"
 
 
+def test_coupon_saved_passthrough(client) -> None:
+    """红包优惠额 coupon_saved 上报→落库→读出;仅目标平台带值,源平台不带(null)。"""
+    token = _login(client, "13800002010")
+    rid = client.post(
+        "/api/v1/compare/record", json=_food_payload("trace-coupon"), headers=_auth(token)
+    ).json()["id"]
+    d = client.get(f"/api/v1/compare/records/{rid}", headers=_auth(token)).json()
+    by_pid = {x["platform_id"]: x for x in d["comparison_results"]}
+    assert by_pid["meituan"]["coupon_saved"] == 7.0            # 目标平台带值
+    assert by_pid["taobao_flash"].get("coupon_saved") is None  # 源平台不带/为 null
+
+
 def test_source_is_cheapest_no_saving(client) -> None:
     """源平台本来就最便宜:saved<=0,is_source_best=True,仍记一条 success。"""
     token = _login(client, "13800002002")