Prom name function

[zeitlinger]

• prometheus_metric_names: returns all possible prometheus metric names using https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/sdk_exporters/prometheus.md#configuration
• prometheus_unit_name: translates prometheus unit name

[codecov]

Codecov Report

❌ Patch coverage is 87.28814% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.0%. Comparing base (33083ad) to head (4ec3f0e).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/weaver_forge/src/extensions/otel.rs	11.7%	15 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##            main   #1051    +/-   ##
======================================
  Coverage   79.0%   79.0%            
======================================
  Files         85      87     +2     
  Lines       7034    7155   +121     
======================================
+ Hits        5558    5657    +99     
- Misses      1476    1498    +22     

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[martincostello]

Is μs something that could/should be catered for too?

[zeitlinger]

I just copied that from the rust SDK - and I think that comes from the go reference implementation

[jsuereth]

We use UCCM standard, not sure that's emojii-ified yet.

[martincostello]

I don't think the Greek letter mu is an emoji 😄

[jsuereth]

Good point - I should have mentioned "any non-US character set" - https://ucum.org/ucum <- They explicitly say they only use US-ASCII here.

Interesting, by specification when printing us, you're supposed to use Greek "mu", not u.