octo-sts/app

AI Summary: The task involves analyzing the necessity of the `EVENT_INGRESS_URI` environment variable in the Octo-STS GitHub App. The current code requires it, but the issue suggests it might be optional, especially when metrics are disabled. The solution likely involves modifying the code to conditionally use the CloudEvents client based on the presence of the environment variable and the `METRICS` flag, potentially creating a no-op client for when it's not needed. This might require understanding the CloudEvents integration within the application and potentially refactoring parts of the code.