fix(cache): set cache item before returning response on first request

[yassilah]

🔗 Linked issue

fixes #1812

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR fixes the linked issue; however, while writing my test I noticed there may be another issue with setting the integrity key in defineCachedEventHandler to an array of items as this will inevitably result in entry.integrity === integrity to be false... I changed it to be hash([opts.integrity, handler]) and all other tests still pass but there may be something I'm not seeing here 😅

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[pi0]

Thanks for PR dear @yassilah. I will have to locally verify your reproduction from #1812. In the meantime, if there is another fix for integrity, feel free to split it into new PR for better changelog.

[yassilah]

You're very welcome! You're right, i'll split it into 2 PRs 😊

[codecov]

Codecov Report

Merging #1813 (63e4b24) into main (3e9302a) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1813      +/-   ##
==========================================
- Coverage   52.36%   52.35%   -0.01%     
==========================================
  Files         170      170              
  Lines       11775    11777       +2     
  Branches      907      907              
==========================================
  Hits         6166     6166              
- Misses       5513     5515       +2     
  Partials       96       96              

Files	Coverage Δ
src/runtime/cache.ts	0.00% <0.00%> (ø)

[pi0]

Thanks!