fix: QA fixes for property decisions feature

- Replace deprecated datetime.utcnow() with datetime.now(UTC) in model
  and repository
- Add listing_type validation to decision_service (RENT/BUY only)
- Fix decision filtering tests failing due to rate limiting by patching
  _match_endpoint
- Add SwipeCard component test suite (11 tests covering rendering,
  interactions, and POI distances)
- Add test for invalid listing_type validation

tests/unit/test_decision_service.py

@@ -40,6 +40,14 @@ class TestSetDecision:
                 listing_type="RENT", decision="maybe",
             )
 
+    def test_invalid_listing_type_raises(self) -> None:
+        repo = MagicMock()
+        with pytest.raises(ValueError, match="Invalid listing_type"):
+            decision_service.set_decision(
+                repo, user_id=1, listing_id=100,
+                listing_type="SELL", decision="liked",
+            )
+
 
 class TestGetDecisions:
     def test_returns_all_decisions(self) -> None: