Add prometheus exporter#619

Draft

albertored wants to merge 10 commits intoopen-telemetry:mainfrom

albertored:prometheus-exporter

Commits on Mar 25, 2024

prometheus plain text exporter
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fix typing
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Reader setup with httpd server
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Fix histogram aggregation
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fixup: Reader setup with httpd server after rebase

RoadRunnr
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fixup: change timestamp types

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fixup: deterministic datapoint order in eunit tests

RoadRunnr
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optimize prometheus exported a bit

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extend unit abbreviations to full plural form

RoadRunnr
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separate httpd logic and prometheus reader

RoadRunnr
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albertored
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