refactor: Move balance tool classes to standard package structure (Package-by-Layer)

suppress_kafka_logs.py

@@ -0,0 +1,17 @@
+import os
+
+for root, _, files in os.walk('.'):
+    for f in files:
+        if f == 'application-local.properties' or f == 'application.properties':
+            p = os.path.join(root, f)
+            try:
+                content = open(p, encoding='utf-8').read()
+            except Exception:
+                content = open(p, encoding='cp949').read()
+                
+            # Add logging level to suppress kafka warnings
+            if 'logging.level.org.apache.kafka' not in content:
+                content += '\n# Suppress Kafka Connection Logs\nlogging.level.org.apache.kafka=ERROR\n'
+                
+            with open(p, 'w', encoding='utf-8') as out:
+                out.write(content)