Settings file imports before everything else

[isc-pbarton]

Closes #697
Fix applies to both incremental and full load handlers, as well as Import All.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 40.99%. Comparing base (d2fba37) to head (a7fa732).
⚠️ Report is 322 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #699      +/-   ##
==========================================
+ Coverage   40.89%   40.99%   +0.10%     
==========================================
  Files          23       23              
  Lines        3157     3161       +4     
==========================================
+ Hits         1291     1296       +5     
+ Misses       1866     1865       -1     

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