feat: allow model independent tasks on ensembles

[MiWeiss]

implements #48

[codecov]

Codecov Report

Merging #50 (341ad13) into main (92a7a9b) will increase coverage by 0.05%.
The diff coverage is 100.00%.

❗ Current head 341ad13 differs from pull request most recent head 2e02101. Consider uploading reports for the commit 2e02101 to get more accurate results

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
+ Coverage   90.92%   90.98%   +0.05%     
==========================================
  Files          28       28              
  Lines        1069     1076       +7     
==========================================
+ Hits          972      979       +7     
  Misses         97       97              

Impacted Files	Coverage Δ
...inty_wizard/models/stochastic_utils/broadcaster.py	92.85% <ø> (ø)
...nty_wizard/models/ensemble_utils/_lazy_ensemble.py	91.09% <100.00%> (+0.44%)	⬆️

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