Adds base recording concept so we can build reporting on top of it.

[jejacks0n]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 96.00000% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 98.58%. Comparing base (d195acd) to head (f98b49f).

Files with missing lines	Patch %	Lines
lib/active_experiment/tasks.rake	72.72%	6 Missing ⚠️
lib/active_experiment/recorders/base_recorder.rb	96.15%	4 Missing ⚠️
...ive_experiment/recorders/active_record_recorder.rb	98.11%	2 Missing ⚠️
lib/active_experiment/recording.rb	96.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #11      +/-   ##
==========================================
- Coverage   99.54%   98.58%   -0.96%     
==========================================
  Files          26       33       +7     
  Lines         876     1201     +325     
==========================================
+ Hits          872     1184     +312     
- Misses          4       17      +13     

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