Dev/test workflow for tracer engineers working on the Datadog .NET tracer — build a local Datadog.AzureFunctions NuGet package, deploy it to a test Azure Function App, trigger it, and analyze traces/logs to verify instrumentation behavior. Use this skill whenever the user is working on Azure Functions instrumentation: building or testing the Datadog.AzureFunctions NuGet package, deploying to a test Function App, analyzing instrumentation logs or spans from an Azure Functions app, or configuring Datadog environment variables on Azure — even if they don't explicitly invoke /azure-functions.