chore: Fix dangerous default argument

[deepsource-autofix]

No description provided.

[codecov]

Codecov Report

Merging #6899 into development will increase coverage by 0.01%.
The diff coverage is 100%.

@@               Coverage Diff               @@
##           development    #6899      +/-   ##
===============================================
+ Coverage        66.34%   66.36%   +0.01%     
===============================================
  Files              308      308              
  Lines            15330    15336       +6     
===============================================
+ Hits             10171    10177       +6     
  Misses            5159     5159

Impacted Files	Coverage Δ
app/models/ticket.py	74.75% <100%> (+1.56%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3a8ff13...c8e5990. Read the comment docs.