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

services/decision_service.py

@@ -3,6 +3,7 @@ from models.decision import ListingDecision
 from repositories.decision_repository import DecisionRepository
 
 VALID_DECISIONS = {"liked", "disliked"}
+VALID_LISTING_TYPES = {"RENT", "BUY"}
 
 
 def set_decision(
@@ -16,6 +17,10 @@ def set_decision(
         raise ValueError(
             f"Invalid decision '{decision}'. Must be one of: {VALID_DECISIONS}"
         )
+    if listing_type not in VALID_LISTING_TYPES:
+        raise ValueError(
+            f"Invalid listing_type '{listing_type}'. Must be one of: {VALID_LISTING_TYPES}"
+        )
     return repository.upsert_decision(
         user_id=user_id,
         listing_id=listing_id,