fix(redis): Use wait strategy instead of deprecated decorator

[mschmitzer]

Another part of fixing #874 (cf. #899).

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 79.52%. Comparing base (f608df9) to head (a9d5bc9). :warning: Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #914      +/-   ##
==========================================
- Coverage   79.78%   79.52%   -0.26%     
==========================================
  Files          14       14              
  Lines        1182     1182              
  Branches      184      184              
==========================================
- Hits          943      940       -3     
- Misses        197      201       +4     
+ Partials       42       41       -1     

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