Mount OTLP/HTTP handlers on the existing Express web server via a second
HTTP listener so OTLP endpoints are reachable at the standard :4318
address without a separate process. Accepts both application/x-protobuf
and application/json content types, routing decoded records through the
same Normalizer pipeline as the gRPC receiver.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
