OpenTelemetry

[ostcar]

Instrument service for OpenTelemetry.

[ostcar]

@ostcar how much work would it be to update this PR? it would be nice to have OTel availble in the autoupdate service, especially for debugging things like the current poll.stop performance

Originally posted by @jsangmeister in #397 (comment)

I can look into this. One important requirement is, that the datastore-writer writes the trace-id into the messagebus. This is needed to create a relation between the backend-action-request and the autoupdate-events.

In my previous PR, I wrote a "key" span in the messagebus: https://github.com/OpenSlides/openslides-autoupdate-service/pull/397/files#diff-bc85461a4330bf9a7f24943c17dea0b71e26621b9e3e57ed8b2f8f5d1d115e24R172-R191

Does the datastore-writer currently add the span? If yes, what is the key and the format?

[jsangmeister]

I remembered implementing this in OpenSlides/openslides-datastore-service#179, but it seems like @peb-adr removed the functionality again before merging. @peb-adr do you remember why? Otherwise, I would like to re-introduce this feature as previously implemented in the PR.

[jsangmeister]

Datastore issue: OpenSlides/openslides-datastore-service#260

[jsangmeister]

@ostcar see notes in OpenSlides/openslides-datastore-service#288