Report failures on dashboard Fixes #18

[jvivian]

• Add test to expand coverage for failures
• Add failure reporting and explanation to dashboard
• Decompose run_parameterized_model into simpler _run_model() subcall

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (0339eb8) 75.2% compared to head (0c695ed) 77.2%.

Files	Patch %	Lines
covid19_drdfm/dfm.py	92.8%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main     #29     +/-   ##
=======================================
+ Coverage   75.2%   77.2%   +1.9%     
=======================================
  Files          5       5             
  Lines        182     180      -2     
  Branches      35      34      -1     
=======================================
+ Hits         137     139      +2     
+ Misses        44      40      -4     
  Partials       1       1             

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