Clarify relevance of ApplicationConfiguration.TraceConfiguration now that ITelemetryContext exists

[InternalHigh]

Type of issue

• Bug
• Enhancement
• Compliance
• Question
• Help wanted

Current Behavior

With the introduction of the ITelemetryContext abstraction for logging and diagnostics, it's unclear what role ApplicationConfiguration.TraceConfiguration still plays.

If TraceConfiguration is no longer relevant, it would be helpful to mark it with [Obsolete] (including a message pointing to ITelemetryContext as the replacement) so that consumers migrating their configuration are guided toward the new approach.

Expected Behavior

No response

Steps To Reproduce

No response

Environment

OPCFoundation.NetStandard.Opc.Ua 1.5.378.156

Anything else?

No response