Pin mashumaro to <3.15

[gshank]

Temporary pin of mashumaro, since 3.15 broke our code.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.11%. Comparing base (ad575ec) to head (fdb61f5).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11046      +/-   ##
==========================================
- Coverage   89.17%   89.11%   -0.07%     
==========================================
  Files         183      183              
  Lines       23765    23765              
==========================================
- Hits        21192    21177      -15     
- Misses       2573     2588      +15     

Flag	Coverage Δ
integration	86.42% <ø> (-0.15%)	⬇️
unit	62.17% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
Unit Tests	62.17% <ø> (ø)
Integration Tests	86.42% <ø> (-0.15%)	⬇️

[github-actions]

The backport to 1.7.latest failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-1.7.latest 1.7.latest
# Navigate to the new working tree
cd .worktrees/backport-1.7.latest
# Create a new branch
git switch --create backport-11046-to-1.7.latest
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 407f6caa1c70a8ba3d8fdbddb5edb4c7afed35bc
# Push it to GitHub
git push --set-upstream origin backport-11046-to-1.7.latest
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-1.7.latest

Then, create a pull request where the base branch is 1.7.latest and the compare/head branch is backport-11046-to-1.7.latest.