Fix type for items mapping

[ogenstad]

Why

Add typehints to dict to remove type ignore comment

What changed

Typehints on dictionary and removal of type ignore statement.

[cloudflare-workers-and-pages]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@           Coverage Diff           @@
##           stable     #983   +/-   ##
=======================================
  Coverage   81.41%   81.41%           
=======================================
  Files         134      134           
  Lines       11347    11347           
  Branches     1703     1703           
=======================================
  Hits         9238     9238           
  Misses       1566     1566           
  Partials      543      543           

Flag	Coverage Δ
integration-tests	41.84% <0.00%> (-0.01%)	⬇️
python-3.10	54.34% <50.00%> (-0.02%)	⬇️
python-3.11	54.36% <50.00%> (ø)
python-3.12	54.34% <50.00%> (-0.02%)	⬇️
python-3.13	54.36% <50.00%> (ø)
python-3.14	54.34% <50.00%> (-0.02%)	⬇️
python-filler-3.12	22.74% <100.00%> (ø)

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Files with missing lines	Coverage Δ
infrahub_sdk/pytest_plugin/loader.py	78.72% <100.00%> (ø)

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