CID-3916: check connection before sending messages

[mohamedlajmileanix]

🛠 Changes made

• check connection before sending messages
• Simplify isConnected logic
• refactor logs

✨ Type of change

• Bug fix (non-breaking change which fixes an issue)

🧪 How Has This Been Tested?

• 👌 No tests required

🏎 Checklist:

• My code follows the style guidelines
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• Any dependent changes have been merged and published in downstream modules
• I have made corresponding changes to the documentation (README.md)
• My commit message clearly reflects the changes made
• Assigned the appropriate labels (version, PR type, etc.)

[github-actions]

LeanIX GitHub Agent Code Coverage

File	Coverage [77.25%]	🍏
WebhookEventService.kt	93.08%	🍏
WebSocketService.kt	59.38%	❌
BrokerStompSessionHandler.kt	18.45%	❌

Total Project Coverage	68.25%	🍏