fix: filter unique scanned handlers

[yassilah]

🔗 Linked issue

Resolves #806

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 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)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

📝 Checklist

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

[codecov]

Codecov Report

Merging #807 (b2b6508) into main (78808dd) will decrease coverage by 2.86%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##             main     #807      +/-   ##
==========================================
- Coverage   70.15%   67.28%   -2.87%     
==========================================
  Files          57       58       +1     
  Lines        5234     5744     +510     
  Branches      576      610      +34     
==========================================
+ Hits         3672     3865     +193     
- Misses       1553     1871     +318     
+ Partials        9        8       -1     

Impacted Files	Coverage Δ
src/scan.ts	66.97% <66.66%> (+0.63%)	⬆️
src/presets/netlify.ts	60.00% <0.00%> (-0.37%)	⬇️
src/dev/vfs.ts	10.00% <0.00%> (-0.31%)	⬇️
src/types/nitro.ts	100.00% <0.00%> (ø)
src/rollup/plugins/dynamic-require.ts	26.56% <0.00%> (ø)
src/rollup/plugins/externals-legacy.ts	6.80% <0.00%> (ø)
src/prerender.ts	89.19% <0.00%> (+0.03%)	⬆️
src/utils/index.ts	51.83% <0.00%> (+0.52%)	⬆️
src/rollup/config.ts	92.12% <0.00%> (+0.54%)	⬆️
src/nitro.ts	87.77% <0.00%> (+0.56%)	⬆️
... and 6 more

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[pi0]

Thanks 💯

[yassilah]

Hi! I think this PR unintentionally caused that important issue: nuxt/nuxt#18515. I believe the filtering function should only be applied to api routes and not middlewares