fix(cli): handling of concurrent map read/write

[schoren]

This PR adds a mising defer for the calling of mutex Unlock when emmiting events. This avoids seeing this kinds of errors:

fatal error: concurrent map writes

goroutine 585 [running]:
github.com/kubeshop/tracetest/agent/ui/dashboard/sensors.(*sensor).Emit(0x140006c2270, {0x105980599, 0x12}, {0x105fb2380?, 0x107531060})
	/home/runner/work/tracetest/tracetest/agent/ui/dashboard/sensors/sensor.go:79 +0x154
github.com/kubeshop/tracetest/agent/collector.(*forwardIngester).ingestSpans(0x140006c40d0, 0x1400090a540)
	/home/runner/work/tracetest/tracetest/agent/collector/ingester.go:110 +0x1ac
created by github.com/kubeshop/tracetest/agent/collector.(*forwardIngester).Ingest in goroutine 597
	/home/runner/work/tracetest/tracetest/agent/collector/ingester.go:91 +0x70

Fixes

• Defer mutex unlock call

Checklist

• tested locally
• added new dependencies
• updated the docs
• added a test

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Name	Status	Preview	Comments	Updated (UTC)
tracetest	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 21, 2024 4:31pm