Add database tests

[gauchoracing]

and improve coverage lol

[netlify]

✅ Deploy Preview for gr-sentinel canceled.

Name	Link
🔨 Latest commit	9fe3c95
🔍 Latest deploy log	https://app.netlify.com/sites/gr-sentinel/deploys/66d17a48a0b95d00086960a4

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 94.91%. Comparing base (5ae7f0a) to head (9fe3c95).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
database/db.go	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            main      #27       +/-   ##
==========================================
+ Coverage   2.87%   94.91%   +92.03%     
==========================================
  Files         49        5       -44     
  Lines       2956      118     -2838     
==========================================
+ Hits          85      112       +27     
+ Misses      2871        5     -2866     
- Partials       0        1        +1     

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