Hotfix/2.0.9

[sblauth]

Fixes a (small) memory leak regarding the database.

[codecov]

Codecov Report

Merging #269 (7676de7) into main (09de2ff) will increase coverage by 0.00%.
The diff coverage is 92.31%.

@@           Coverage Diff           @@
##             main     #269   +/-   ##
=======================================
  Coverage   92.58%   92.58%           
=======================================
  Files          83       83           
  Lines        6456     6458    +2     
=======================================
+ Hits         5977     5979    +2     
  Misses        479      479           

Impacted Files	Coverage Δ
...optimization/line_search/polynomial_line_search.py	80.65% <75.00%> (ø)
...cs/_optimization/line_search/armijo_line_search.py	92.65% <100.00%> (ø)
cashocs/_optimization/line_search/line_search.py	100.00% <100.00%> (ø)
cashocs/geometry/mesh_handler.py	93.77% <100.00%> (+0.02%)	⬆️

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