ExtractMetadataFromContext extracts traceparent id from given context and returns it in a map following a format {"traceparent": "<id>"}.

InitProvider initializes the global meter and tracer providers and returns a func used to close exporters running in the background or an error if the initialization failed.

InjectMetadataIntoContext takes in a map following a format {"traceparent": "<id>"} and returns a new context with the metadata appended.

SetSpanErr records given error to the span and sets the span's status as Error with err.Error() as the description.