[ericcurtin]

Summary

Opt-in OTLP push for gateway metrics, alongside the Prometheus endpoint.

Related Issue

Closes #4489

Changes

• metrics = true or [openshell.gateway.otlp.metrics] enables push.
• MetricsBridge feeds the metrics recorder into an OTel meter.
• Docs updated.

Testing

• cargo fmt, clippy, rust:deny:policy, markdown:lint, docs:nav; openshell-otel and openshell-server tests pass
• Unit tests added/updated (bridge, config, gRPC push to a loopback collector)
• E2E tests added/updated (not applicable)

Checklist

• Follows Conventional Commits
• Commits are signed off (DCO)
• Architecture docs updated (if applicable)

[copy-pr-bot]

This pull request requires additional validation before any workflows can run on NVIDIA's runners.

Pull request vetters can view their responsibilities here.

Contributors can view more details about this message here.

[ericcurtin]

@krishicks @johntmyers PTAL, and /ok to test 78d292cdce6a72b04329b9fc544acb5f3dc17656 if it looks good. Thank you!

[ericcurtin]

Merged main to fix conflicts. @krishicks @johntmyers PTAL, and /ok to test c249350728a99add71c964ec0e6c158ce07966f1 if it looks good. Thank you!

[ericcurtin]

@TaylorMutch @SDAChess PTAL, and /ok to test c249350728a9 if it looks good. Thank you!

[ericcurtin]

@TaylorMutch @SDAChess PTAL, and /ok to test c249350728a99add71c964ec0e6c158ce07966f1 if it looks good (full SHA, short ones fail). Thank you!

[ericcurtin]

Merged main and fixed the conflicts. Kept both the metrics and agent OTLP tables. @mrunalp PTAL, and /ok to test 994371ef40e3e201b39c133bdf09887e064a1b9b if it looks good. Thank you!

[ericcurtin]

Merged main and fixed the conflicts. Dropped the OCSF schema_version plumbing that was removed upstream. @mrunalp PTAL when you get a chance. Thank you!