Add OpenTelemetry-Compatible Telemetry Utility Function

[beeme1mr]

Description

Add a telemetry utility function to the SDK that can be used within the finally stage of a hook to create OpenTelemetry-compatible telemetry signals. It must comply with the OpenTelemetry specification and meet the technical requirements, including those from Appendix D of the OpenFeature Specification and the OpenTelemetry Semantic Conventions for Feature Flags.

Requirements

• Must comply with the OpenTelemetry (OTel) specification.
• Must be included in the SDK.
• Must not include any third-party dependencies.
• Must adhere to the observability conformance requirements in Appendix D of the OpenFeature Specification.

Example implementation

A JavaScript implementation can found here.

[beeme1mr]

Relates to #175