Migrate contexts, tags to attributes

[sentrivana]

contexts set by the SDK should be translated into span attributes. Follow https://getsentry.github.io/sentry-conventions/, or OTel conventions if there is no Sentry convention. Consider adding missing attributes to Sentry conventions.

Notes:

• profiler_id should be added as attribute to each span.
• only contexts, tags, etc. set by the SDK, not by the user, should be migrated