fix: remove intentional errors causing 500s on /ping endpoint

[plural-copilot]

Summary

The current /ping endpoint in the flow-test service intentionally raises an exception every third second, causing intermittent 500 Internal Server Errors. This behavior is triggering production alerts and impacting service readiness and monitoring.

Changes Made

• Commented out the conditional exception raising block in the /ping endpoint in app/main.py.

Rationale

• The /ping endpoint is typically used as a health check and must consistently return successful responses.
• Removing intentional errors prevents false positives in monitoring and alerting.
• This fix stabilizes the alerting by preventing intermittent failures on a critical readiness endpoint.

After applying this change, redeploy the application to resolve the production 500 error alert on /ping. If error simulation is required, use feature flags or non-production environments.

This is a minimal and safe change to address the root cause of the alert firing.