feat(library/pipeline): add iqb_parquet_read

[bassosimone]

This code introduces a common function for reading parquet inside the pipeline, adapting previously existing code and ensuring we are testing the implementation with actual parquet files.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.73%. Comparing base (d534af3) to head (658527e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #58      +/-   ##
==========================================
+ Coverage   80.25%   80.73%   +0.48%     
==========================================
  Files          21       23       +2     
  Lines        2046     2087      +41     
==========================================
+ Hits         1642     1685      +43     
+ Misses        404      402       -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.