Error handling functions

These functions can be used to trace or construct errors.

Name	Description
Diagnostics.ActivityId	Returns an opaque identifier for the currently-running evaluation.
Diagnostics.CorrelationId	Returns an opaque identifier to correlate incoming requests with outgoing ones.
Diagnostics.Trace	Writes a trace message, if tracing is enabled, and returns value.
Error.Record	Returns an error record from the provided text values for reason, message, detail, and error code.