CID-3000: Switch from app name to slug

[mohamedlajmileanix]

🛠 Changes made

If the GitHub App name includes special characters, GitHub encodes it in way that is unknown for us. Hence, the agent need to send the GitHub App slug instead of name.

✨ Type of change

Please delete the options that are not relevant.

🧪 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
• 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 [95.14%]	🍏
GitHubAppResponse.kt	100%	🍏
GitHubEnterpriseService.kt	94.98%	🍏
PostStartupRunner.kt	93.75%	🍏

Total Project Coverage	66.94%	🍏