Add optoinal deep tracing to request

[sam-at-luther]

No description provided.

[sam-at-luther]

Suggestion to add a helper function to set deepTracing flag on trace baggage which is propagated across the stack:

package trace

import (
    "context"
    "fmt"
    "go.opentelemetry.io/otel/baggage"
    "go.opentelemetry.io/otel/label"
)

// AddDeepTracingToContext adds the deepTracing flag to the context as baggage.
func AddDeepTracingToContext(ctx context.Context, enableDeepTracing bool) (context.Context, error) {
    if enableDeepTracing {
        member, err := label.New("deepTracing", "true")
        if err != nil {
            return ctx, fmt.Errorf("failed to create baggage member: %w", err)
        }
        return baggage.ContextWithValues(ctx, member), nil
    }
    return ctx, nil
}