feat: Add observability examples to .NET examples repo#8
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Add a standalone console example under server-sdk/features/plugins/observability demonstrating the LaunchDarkly.Observability plugin (custom spans, metrics, and logs), and add the observability plugin to the OpenAI chat-completions AI framework example with OpenAI's experimental OpenTelemetry enabled. SDK-2665
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Adds examples demonstrating the
LaunchDarkly.Observabilityplugin. Resolves SDK-2665.What's included
New console example —
server-sdk/features/plugins/observabilityBased on the getting-started
HelloDotNetexample, with the observability plugin added:ObservabilityPluginon the SDK configuration viaPluginConfigurationBuilder.Host.CreateApplicationBuilder, blocking onWaitForShutdownso Ctrl+C shuts down cleanly and flushes telemetry.Observe.StartActivity— a console app has no framework auto-instrumentation, so spans must be created explicitly.Observe.RecordIncr) and a structured log (Observe.RecordLog) per evaluation and flag change.OpenAI chat-completions example —
server-sdk-ai/frameworks/openai/chat-completionsOPENAI_EXPERIMENTAL_ENABLE_OPEN_TELEMETRY=trueso the OpenAI SDK emits OpenTelemetry.OpenAI.ChatClientactivity source and meter with the plugin so the model call's spans andgen_ai.*token-usage metrics export to LaunchDarkly.Also updates
server-sdk/README.mdwith a Features table entry for the new example.Verification
dotnet build).gen_ai.*spans/metrics) confirmed exporting to a local OTLP sink.