fix(price): normalize cantitate_roa < 1 in price comparison (false mismatch)

Kit detection only checked cantitate_roa > 1, missing fractional values
like 0.5 (GoMag 50buc/set → ROA 100buc/set). This caused false price
difference alerts (e.g. GoMag 7.00 vs ROA 14.00 for order #481595156).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/tests/test_business_rules.py

@@ -60,7 +60,7 @@ def make_order(items, discount_total=0.0, delivery_cost=0.0, discount_vat=None):
 def is_kit(comps):
     """Kit detection pattern used in validation_service and price_sync_service."""
     return len(comps) > 1 or (
-        len(comps) == 1 and (comps[0].get("cantitate_roa") or 1) > 1
+        len(comps) == 1 and (comps[0].get("cantitate_roa") or 1) != 1
     )
 
 
@@ -492,3 +492,126 @@ class TestResolveCodmatIds:
         codmats = [c["codmat"] for c in result["SKU1"]]
         assert "COD1" in codmats
         assert "COD2" in codmats
+
+
+# ===========================================================================
+# Group 6: get_prices_for_order() — cantitate_roa price normalization
+# ===========================================================================
+
+from app.services.validation_service import get_prices_for_order
+
+
+def _mock_oracle_conn(pol_cu_tva=False, price_map=None):
+    """Build a mock Oracle connection for get_prices_for_order.
+
+    price_map: {id_articol: (pret, proc_tvav)}
+    """
+    if price_map is None:
+        price_map = {}
+    conn = MagicMock()
+
+    def cursor_ctx():
+        cur = MagicMock()
+        # CRM_POLITICI_PRETURI — PRETURI_CU_TVA flag
+        cu_tva_row = [1 if pol_cu_tva else 0]
+        # CRM_POLITICI_PRET_ART — prices
+        price_rows = [
+            (1, id_art, pret, proc_tvav)
+            for id_art, (pret, proc_tvav) in price_map.items()
+        ]
+        # fetchone for PRETURI_CU_TVA, __iter__ for price rows
+        cur.fetchone = MagicMock(return_value=cu_tva_row)
+        cur.__iter__ = MagicMock(return_value=iter(price_rows))
+        return cur
+
+    cm = MagicMock()
+    cm.__enter__ = MagicMock(side_effect=cursor_ctx)
+    cm.__exit__ = MagicMock(return_value=False)
+    conn.cursor.return_value = cm
+    return conn
+
+
+class TestGetPricesForOrderCantitateRoa:
+    """Regression: cantitate_roa < 1 must be treated as kit for price normalization.
+
+    Bug: SKU with cantitate_roa=0.5 (GoMag 50buc=7lei, ROA 100buc=14lei)
+    was reported as price mismatch because is_kit only checked > 1.
+    """
+
+    def test_cantitate_roa_half_matches(self):
+        """cantitate_roa=0.5: ROA price 14.00 * 0.5 = 7.00 should match GoMag 7.00."""
+        items = [{
+            "sku": "1057308134545",
+            "price": 7.00,
+            "quantity": 60,
+            "codmat_details": [{
+                "codmat": "8OZLRLP",
+                "cantitate_roa": 0.5,
+                "id_articol": 100,
+                "cont": "345",
+            }],
+        }]
+        conn = _mock_oracle_conn(pol_cu_tva=True, price_map={100: (14.00, 1.19)})
+        result = get_prices_for_order(items, {"id_pol": "1"}, conn=conn)
+
+        assert result["items"][0]["match"] is True
+        assert abs(result["items"][0]["pret_roa"] - 7.00) < 0.01
+        assert result["summary"]["mismatches"] == 0
+
+    def test_cantitate_roa_half_mismatch(self):
+        """cantitate_roa=0.5: ROA price 10.00 * 0.5 = 5.00 != GoMag 7.00."""
+        items = [{
+            "sku": "SKU-HALF",
+            "price": 7.00,
+            "quantity": 1,
+            "codmat_details": [{
+                "codmat": "COD1",
+                "cantitate_roa": 0.5,
+                "id_articol": 200,
+                "cont": "345",
+            }],
+        }]
+        conn = _mock_oracle_conn(pol_cu_tva=True, price_map={200: (10.00, 1.19)})
+        result = get_prices_for_order(items, {"id_pol": "1"}, conn=conn)
+
+        assert result["items"][0]["match"] is False
+        assert abs(result["items"][0]["pret_roa"] - 5.00) < 0.01
+        assert result["summary"]["mismatches"] == 1
+
+    def test_cantitate_roa_one_simple_item(self):
+        """cantitate_roa=1 (default): simple item, direct price comparison."""
+        items = [{
+            "sku": "SKU-SIMPLE",
+            "price": 63.79,
+            "quantity": 8,
+            "codmat_details": [{
+                "codmat": "COD-DIRECT",
+                "cantitate_roa": 1,
+                "id_articol": 300,
+                "cont": "345",
+            }],
+        }]
+        conn = _mock_oracle_conn(pol_cu_tva=True, price_map={300: (63.79, 1.19)})
+        result = get_prices_for_order(items, {"id_pol": "1"}, conn=conn)
+
+        assert result["items"][0]["match"] is True
+        assert result["summary"]["mismatches"] == 0
+
+    def test_cantitate_roa_gt1_kit(self):
+        """cantitate_roa=2: kit with 2 ROA units per GoMag unit."""
+        items = [{
+            "sku": "SKU-KIT2",
+            "price": 20.00,
+            "quantity": 1,
+            "codmat_details": [{
+                "codmat": "COD-KIT",
+                "cantitate_roa": 2,
+                "id_articol": 400,
+                "cont": "345",
+            }],
+        }]
+        conn = _mock_oracle_conn(pol_cu_tva=True, price_map={400: (10.00, 1.19)})
+        result = get_prices_for_order(items, {"id_pol": "1"}, conn=conn)
+
+        assert result["items"][0]["match"] is True
+        assert abs(result["items"][0]["pret_roa"] - 20.00) < 0.01