feat(go): add attributes to CLI

[AndreyMarkinPPC]

No description provided.

[gemini-code-assist]

Code Review

This pull request adds OpenTelemetry tracing attributes to the execute and run CLI commands, and appends LIMIT clauses to the example SQL queries. However, the changes in root.go introduce a couple of issues: they discard the command context by using context.Background() and create a potential span leak if garf.New returns an error.

[gemini-code-assist]

There are two issues here:\n1. Context Propagation: Using context.Background() discards any context (including cancellation, deadlines, or parent metadata) that Cobra or the caller set up on the command. We should use cmd.Context() instead.\n2. Span Leak on Error: If garf.New returns an error, PersistentPreRunE exits early. Since PersistentPostRunE is not executed when PersistentPreRunE fails, the span created here will be leaked (never ended). We should capture the span and explicitly call span.End() in the error path.

Suggested change

	ctx, _ := tracer.Start(context.Background(), "cli")
	cmd.SetContext(ctx)
	defer span.End()
	garfEndpoint := viper.GetString("endpoint")
	g, err := garf.New(ctx, garfEndpoint)
	if err != nil {
	ctx, span := tracer.Start(cmd.Context(), "cli")
	cmd.SetContext(ctx)
	garfEndpoint := viper.GetString("endpoint")
	g, err := garf.New(ctx, garfEndpoint)
	if err != nil {
	span.End()