fix: replace the collection endpoint while keeping trace ids

Author: zimeg

internal/tracer/tracer.go

@@ -29,11 +29,14 @@ func SetupTracer(isDev bool, disableTelemetry bool) (io.Closer, opentracing.Trac
 	if isDev {
 		collectorEndpoint = "https://dev.slackb.com/traces/v1/jaeger"
 	}
+	if disableTelemetry {
+		collectorEndpoint = ""
+	}
 
 	// Recommended configuration for production.
 	var jCfg = jaegercfg.Configuration{
 		ServiceName: "slack-cli", // Don't change this.  Required to distinguish logs & traces coming from the CLI
-		Disabled:    disableTelemetry,
+		Disabled:    false,       // Keep tracer active so span contexts and trace IDs are still generated
 		Reporter: &jaegercfg.ReporterConfig{
 			LogSpans:            false,
 			CollectorEndpoint:   collectorEndpoint,