Add `dbutil.ScanAllJSON`

[codecov[bot]]

Codecov Report

Merging #100 (f0f224c) into main (25e0a10) will decrease coverage by 0.12%. The diff coverage is 72.72%.

@@            Coverage Diff             @@
##             main     #100      +/-   ##
==========================================
- Coverage   91.37%   91.25%   -0.12%     
==========================================
  Files          38       38              
  Lines        1739     1750      +11     
==========================================
+ Hits         1589     1597       +8     
- Misses        119      121       +2     
- Partials       31       32       +1     

Files Changed	Coverage Δ
dbutil/scan.go	83.33% <72.72%> (-2.72%)	:arrow_down:

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