Promote Mustela lotion identity anchor

tests/test_marketplace_product_matcher.py

@@ -1759,16 +1759,35 @@ def test_marketplace_matcher_promotes_safe_exact_spec_near_threshold():
         "【Mustela 慕之恬廊】慕之幼 爽身潤膚乳500mlX2",
         "Mustela慕之恬廊 慕之幼爽身潤膚乳500mlX2",
     )
+    mustela_lotion_2pack_production_title = score_marketplace_match(
+        "【Mustela 慕之恬廊】慕之幼 加量版爽身潤膚乳 500mlX2入(寶寶 嬰兒乳液 公司貨 台灣獨家總代理)",
+        "【慕之恬廊】慕之幼爽身潤膚乳(500毫升X2入)",
+        momo_price=1390,
+        competitor_price=1210,
+    )
     herbacin_hand_cream = score_marketplace_match(
         "【Herbacin 德國小甘菊】小甘菊1號護手霜20ml",
         "Herbacin 小甘菊經典護手霜20ml",
     )
 
-    for diagnostics in (opi, mustela, romand, muji_hand_cream, mustela_lotion_2pack, herbacin_hand_cream):
+    for diagnostics in (
+        opi,
+        mustela,
+        romand,
+        muji_hand_cream,
+        mustela_lotion_2pack,
+        mustela_lotion_2pack_production_title,
+        herbacin_hand_cream,
+    ):
         assert diagnostics.score >= 0.76
         assert diagnostics.hard_veto is False
         assert "strong_exact_spec_match" in diagnostics.reasons
 
+    assert any(
+        reason.startswith("shared_identity_anchor")
+        for reason in mustela_lotion_2pack_production_title.reasons
+    )
+
     assert muji_brandless_hand_cream.score >= 0.76
     assert muji_brandless_hand_cream.hard_veto is False
     assert "focused_exact_identity_muji_aroma_hand_cream_brandless" in muji_brandless_hand_cream.reasons