chore: trace propagation implementation #51
Merged
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This PR implements trace propagation, adds a
MakeSpan
trait that grab anytraceparent
andtracestate
headers, and injecting them into span context. The result is that requests fromv3-engine
show up in NDC agents as follows:The implementation is taken from
ndc-multitenant
for consistency.Also resolves #43 , by not specifying a tracing level, the defaults make 2xx responses into
INFO
and4xx
and5xx
intoERROR
.