fix(db0): close database connection after dispose

[kricsleo]

resolves #680

[pi0]

You are awesome!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.77%. Comparing base (a52bf75) to head (79b5e1f).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #693   +/-   ##
=======================================
  Coverage   91.77%   91.77%           
=======================================
  Files           5        5           
  Lines         401      401           
  Branches      126      126           
=======================================
  Hits          368      368           
  Misses         33       33           

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[43081j]

caught this up and fixed the tests FYI 👍