feat: DH-22039: Additional Logging for DashboardLayout Config Change

[dgodinez-dh]

Additional debug logging to help track the issue seen in https://deephaven.atlassian.net/browse/DH-21843

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.80%. Comparing base (33a489f) to head (9c3424e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2637   +/-   ##
=======================================
  Coverage   49.80%   49.80%           
=======================================
  Files         774      774           
  Lines       43813    43815    +2     
  Branches    11085    11085           
=======================================
+ Hits        21820    21822    +2     
  Misses      21975    21975           
  Partials       18       18           

Flag	Coverage Δ
unit	49.80% <100.00%> (+<0.01%)	⬆️

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