Do nothing on log insertion conflict

[sandreae]

closes: #462

📋 Checklist

• Add tests that cover your changes
• Add this PR to the Unreleased section in CHANGELOG.md
• Link this PR to any issues it closes
• New files contain a SPDX license header

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.02% ⚠️

Comparison is base (e656d80) 91.83% compared to head (c895df0) 91.82%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #468      +/-   ##
==========================================
- Coverage   91.83%   91.82%   -0.02%     
==========================================
  Files         100      100              
  Lines       15733    15734       +1     
==========================================
- Hits        14449    14447       -2     
- Misses       1284     1287       +3     

Files Changed	Coverage Δ
aquadoggo/src/db/stores/log.rs	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

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