Log more split info [Resolves #124]

[thcrock]

Information like lookback durations is tougher to include here because that info doesn't travel with the split, but this level of information is easy to provide.

[codecov-io]

Codecov Report

Merging #134 into master will increase coverage by 1%.
The diff coverage is 80%.

@@           Coverage Diff            @@
##           master     #134    +/-   ##
========================================
+ Coverage    87.8%   88.81%    +1%     
========================================
  Files          22       22            
  Lines        1156     1305   +149     
========================================
+ Hits         1015     1159   +144     
- Misses        141      146     +5

Impacted Files	Coverage Δ
triage/pipelines/base.py	97.12% <100%> (-1.03%)	⬇️
triage/pipelines/serial.py	89.18% <100%> (+0.3%)	⬆️
triage/pipelines/local_parallel.py	62.06% <100%> (ø)	⬆️
triage/model_trainers.py	90.62% <62.5%> (+0.07%)	⬆️
triage/db.py	88.76% <0%> (-0.65%)	⬇️
triage/scoring.py	98.86% <0%> (-0.15%)	⬇️
triage/utils.py	93.43% <0%> (+1.43%)	⬆️

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