Add OpenTelemetry support for passkey operations

[p3dr0rv]

This PR adds full OpenTelemetry tracing for passkey flows that use JS bridge and makes trace context consistent across the auth process. What’s new:

PasskeyReplyChannel: Creates spans and sets attributes for success, errors, and send actions. PasskeyWebListener: Accepts SpanContext, creates spans per message, and makes them current. WebViewClient: Propagates parent SpanContext so all web view spans share the same trace.

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