[SYSTEMDS-3977] Split Aware Execution

[christinadionysio]

This patch adds split aware execution of trained representations to avoid leaking data between train/val/test splits.

Assisted-by: AI

[codecov]

Codecov Report

❌ Patch coverage is 55.81916% with 987 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.27%. Comparing base (cbb62dd) to head (d7d62f1).

Files with missing lines	Patch %	Lines
.../python/systemds/scuro/representations/openface.py	8.60%	138 Missing ⚠️
...n/systemds/scuro/representations/video_batching.py	26.62%	124 Missing ⚠️
...main/python/systemds/scuro/representations/lstm.py	11.96%	103 Missing ⚠️
...systemds/scuro/drsearch/multimodal_ga_optimizer.py	61.58%	63 Missing ⚠️
...n/systemds/scuro/drsearch/split_aware_evaluator.py	73.66%	59 Missing ⚠️
...ain/python/systemds/scuro/models/training_stats.py	39.13%	56 Missing ⚠️
...uro/representations/multimodal_attention_fusion.py	14.03%	49 Missing ⚠️
...in/python/systemds/scuro/representations/fusion.py	44.18%	48 Missing ⚠️
src/main/python/systemds/scuro/drsearch/task.py	62.03%	41 Missing ⚠️
...on/systemds/scuro/drsearch/hyperparameter_tuner.py	68.69%	36 Missing ⚠️
... and 31 more

Additional details and impacted files

@@              Coverage Diff              @@
##               main    #2620       +/-   ##
=============================================
+ Coverage     71.89%   74.27%    +2.37%     
=============================================
  Files          2081      437     -1644     
  Lines        223652    26568   -197084     
  Branches      38581        0    -38581     
=============================================
- Hits         160797    19733   -141064     
+ Misses        51706     6835    -44871     
+ Partials      11149        0    -11149     

Flag	Coverage Δ
java	?
python	74.27% <55.81%> (-0.68%)	⬇️

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