fix: Reduce High severity issues reported by SonarCloud #2865 (#3103)

* fix: add UnsupportedOperationException in KingsHand and GameLoopTest

* refactor: update DatabaseService to use constant for BINARY_DATA and remove obsolete test files

* refactor: update timePasses method in KingsHand

* refactor CandyGame.java

* refactor: simplify boundary checks in CandyGame

* feat: add getters for type and points in Candy class and initialize logger in CandyGame

* remove class and logger initialization in CandyGame

* Modify CandyGame.java

* fix Checkstyle violations

* Remove generic wildcard type in ThreatAwareSystem

event-aggregator/src/main/java/com/iluwatar/event/aggregator/KingsHand.java

@@ -43,5 +43,7 @@ public class KingsHand extends EventEmitter implements EventObserver {
 
   @Override
   public void timePasses(Weekday day) {
+    // This method is intentionally left empty because KingsHand does not handle time-based events directly.
+    // It serves as a placeholder to fulfill the EventObserver interface contract.
   }
 }