Release v7.10.6

Changed

• Route named and default diagnostics registrations through dedicated keyed and unkeyed meter/activity source implementations to avoid constructor-selection ambiguity during DI activation.
• Align related specs and analyzer test sources with concise type references and update local dictionary entries for new diagnostics terminology.

Fixed

• Prevent failures resolving IActivitySource<T> and IMeter<T> when an unkeyed framework ActivitySource or Meter is present in the service collection.
• Add regression specs covering named and self-binding diagnostics resolution with unkeyed framework diagnostics registrations.