Runs fn with a marker that fills in if an llm_request span is created inside it.
onRecorded runs at that moment: what the node knew before the request (its configured
model and provider) is recorded before a fallback can overwrite the provider with the
instance that actually served, and never afterwards.
Runs
fnwith a marker that fills in if anllm_requestspan is created inside it.onRecordedruns at that moment: what the node knew before the request (its configured model and provider) is recorded before a fallback can overwrite the provider with the instance that actually served, and never afterwards.