Deployed an API to App Engine Standard and need to inspect running code without redeploying. Which tool lets you modify runtime behavior or collect in-flight diagnostics via logpoints?

Stackdriver Debug Logpoints (now Cloud Debugger Logpoints) allow you to inject logging statements into your running App Engine Standard application without redeploying. This is crucial for inspecting runtime behavior and collecting in-flight diagnostics. Stackdriver Debug Snapshots (now Cloud Debugger Snapshots) let you capture the full state of your application at a specific line of code, but they don't modify runtime behavior or add continuous logging. Stackdriver Trace (now Cloud Trace) is for understanding latency and performance across requests, not for inspecting code execution directly. Stackdriver Monitoring (now Cloud Monitoring) collects metrics and logs, but it doesn't offer the ability to dynamically inject logpoints into running code.