Built-in tracing

[shuhaowu]

The framework should be able to automatically trace regions of application run similar to Golang's trace region API: https://pkg.go.dev/runtime/trace#hdr-User_annotation. The application can then leverage the same system to create even more detailed traces.

One possible way to do this is via LTTng-UST. Another way to do this is via Perfetto. The former should be lock-free and constant time, the latter should also be. However, the latter uses string interning internally and it's unclear how that affects the worst-case runtime of the trace API calls.