test: 밸런스 분석 및 상수 테스트 추가

- balance_analysis_test 추가
- balance_constants_test 추가
- 기존 테스트 업데이트

test/core/engine/progress_loop_test.dart

@@ -52,7 +52,7 @@ void main() {
     service = ProgressService(
       config: config,
       mutations: mutations,
-      rewards: RewardService(mutations),
+      rewards: RewardService(mutations, config),
     );
   });
 

test/core/engine/progress_service_test.dart

@@ -19,7 +19,7 @@ void main() {
     service = ProgressService(
       config: config,
       mutations: mutations,
-      rewards: RewardService(mutations),
+      rewards: RewardService(mutations, config),
     );
   });