feat(tracer): add OTLP metrics HTTP exporter for span metrics#4899

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rachel.yang/otlp-span-metrics-transport

Commits on Jul 21, 2026

feat(tracer): add OTLP metrics HTTP exporter (SEMCON-1093 PR3)

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fix(tracer): decode OTLP export proto in test without collector/metrics/v1

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refactor(tracer): update exporter to call unexported buildOTLPMetricsRequest

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refactor(tracer): reuse otlpTransport in otlpMetricsExporter

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fix(tracer): shorten comments in PR3 OTLP metrics exporter and config helpers

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refactor(config): replace resolveOTLPMetricsProtocol with GetStringWithValidator + OTLP_PROTOCOL fallback

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fix(config): split merged comment blocks for parseAndValidateOTLPURL and resolveOTLPTraceURL

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fix(tracer): use otlpMetricsContentTypeProto constant instead of string literal

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refactor(tracer): extract buildBaseResourceAttrs to deduplicate resource attribute logic

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refactor(tracer): consolidate OTLP content-type constants in otlp_transport.go

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fix(tracer): address PR3 review feedback for OTLP span metrics transport

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Commits on Jul 23, 2026

Commits on Jul 24, 2026