Add UUID to sprints

[rowanseymour]

Massive diff because every sequentially generated UUID in our tests changes

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 81.75%. Comparing base (33a456a) to head (c6403ca).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
flows/engine/sprint.go	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1303      +/-   ##
==========================================
- Coverage   81.75%   81.75%   -0.01%     
==========================================
  Files         276      276              
  Lines       21334    21334              
==========================================
- Hits        17442    17441       -1     
- Misses       3318     3319       +1     
  Partials      574      574              

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