Update mysql Docker tag to v26

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
mysql (source)	service	major	8.4 → 26.7

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (a77edc8) to head (e7b3024).

Additional details and impacted files

@@             Coverage Diff             @@
##              master     #1594   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity      3913      3913           
===========================================
  Files            685       685           
  Lines          10901     10901           
===========================================
  Hits           10901     10901           

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