wip: add OpenTelemetry metrics instrumentation

[PavelPashov]

Description

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Checklist

• [ ] Does npm test pass with this change (including linting)?
• [ ] Is the new or changed code fully tested?
• [ ] Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?

[elimelt]

This is an exciting feature, I hope it makes it to main!