Instrument components with telemetry context

This page is a capture in the next bucket of the product backlog — a pre-sprint idea, not yet pulled into a sprint as a story.

Now that logging has been integrated with telemetry, the next step is to instrument key components with the TLOG_SEV macro to enable trace correlation.

Tasks:

• Instrument server_session with root span on connection, child spans per request.
• Instrument client_session with spans for outgoing requests.
• Pass telemetry_context through message handlers in ores.iam, ores.refdata, etc.
• Add spans for database operations in ores.database.