Ensure onSpanEnd callbacks are always invoked for ended spans #486
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Goal
Fixes an issue where onSpanEnd callbacks are not invoked for sampled spans. Since the span tracking plugins rely on these callbacks to stop tracking spans, it means they end up holding on to span references for longer than is necessary.
Design
Reversed the logic in the Tracer's
onEndmethod so that the callbacks are invoked before the sampling checkTesting
Covered by CI