posthog-v7.69.0

Minor changes

• 3cc2d64 client.metrics now attaches a trace exemplar to each series it flushes. A sample recorded inside a sampled span (a PostHog start_span span, or the current OpenTelemetry span) stamps its data point with that span's trace ID, span ID, and value, so metric charts can link to a representative trace. One exemplar per series per flush window; the last sample wins. — Thanks @DanielVisca!