feat: Improve OpenTelemetry trace instrumentation

caddyserver / caddy

Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS

https://caddyserver.com

Apache License 2.0

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Open cedricziel opened 1 week ago

cedricziel commented 1 week ago

This PR enhances the opentelemetry instrumentation for caddy by:

creating client spans for reverse proxy request to fix servicegraph calculations
injecting, conditionally, a server-timing header to propagate the traceparent down to the caller