Implement tracing capability

We need a way to trace certain server side operations (for example upsert) to address possible performance issues in the fields.

General approach is to mark the code with tracing entries:

Event event = start("someOperation", traceId, label, ...);
...
event.finish()

Possible implementation options:

1. OpenTracing API based intergration
2. Event based tracing
   1. lttng for Linux
   2. JFR
3. Trace logging (simplest approach with most overhead)

Clarification is required.