Implement in-memory exporters for traces + logs

[fractalwrench]

Goal

Implements an in-memory exporter for span + log objects. Closes #39.

Testing

Added unit tests.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.71%. Comparing base (5c702f4) to head (9ced2f4).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
+ Coverage   90.65%   90.71%   +0.06%     
==========================================
  Files         210      214       +4     
  Lines        2279     2295      +16     
  Branches      233      233              
==========================================
+ Hits         2066     2082      +16     
  Misses        160      160              
  Partials       53       53              

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[Msksgm]

LGTM

[bidetofevil]

Should this be under a test source set? It doesn't feel like it is robust enough to be used for production given that the telemetry are kept in memory indefinitely, so it feels like it should either be strictly for testing, or need a bit more safety around it to prevent it being a memory-leaking foot-gun

[fractalwrench]

@bidetofevil how about providing them in a separate module named something like exporters-in-memory? That would make it clearer that it's not included by default for a reason.

[bidetofevil]

Anything that makes it clear they aren't intended for production usage would work for me.

[fractalwrench]

Moved the classes to a separate module.

[bidetofevil]

LGTM

[Msksgm]

LGTM