Retry initial Redis connection (Fixes #1534)

[miguelgrinberg]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (2089253) to head (1c30ff0).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1536   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           31        31           
  Lines         2656      2662    +6     
  Branches       452       452           
=========================================
+ Hits          2656      2662    +6     

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