The diagnostics-otel extension validates that protocol is "http/protobuf"
but was importing JSON-based `-http` exporters. This caused silent failures
with backends like VictoriaMetrics that only accept protobuf-encoded OTLP.
Switch all three exporter imports (metrics, traces, logs) from
`@opentelemetry/exporter-*-otlp-http` to `@opentelemetry/exporter-*-otlp-proto`.
Fixes#24942
Co-authored-by: Cursor <cursoragent@cursor.com>
(cherry picked from commit f5c0bf0497)
9d3bd50990