🐛 Fix: Add retry mechanism for RabbitMQ message publishing failures

[ChanYoungHan]

🐛 Fix: Add retry mechanism for RabbitMQ message publishing failures

Summary

Improve RabbitMQ connection reliability by implementing retry logic for failed message publishing due to network issues.

Changes

• Retry Logic: Added 3-attempt retry mechanism for failed message publishing
• Connection Timeout: Reduced default timeout values for faster failure detection
  • Connection timeout: 30s → 10s
  • Heartbeat: 600s → 300s
  • Blocked connection timeout: 300s → 60s
• Connection Attempts: Increased from 3 to 5 attempts with reduced retry delay
• TCP Options: Added TCP keepalive settings to resolve IPv6 connection issues
• Error Handling: Enhanced error logging with retry attempt information

Benefits

• ✅ Improved connection stability in unreliable network environments
• ✅ Faster detection and recovery from connection failures
• ✅ Better error visibility through enhanced logging
• ✅ Reduced message publishing failures due to temporary network issues

Files Modified

• utils/rabbitmq_publisher.py