Replace apply() with storage.mode() for integer to numeric conversion

[utkarshpawade]

Fixes #525

replace apply(predictions, 2, as.numeric) in validate_predictions() with storage.mode(predictions) <- "numeric", an in place conversion that avoids column wise iteration and intermediates. this also removes the unnecessary nrow == 1 special case since storage.mode<- handles all matrix dimensions uniformly

[Copilot]

Pull request overview

This PR optimizes integer-to-numeric conversion inside validate_predictions() by switching from a column-wise apply(..., as.numeric) approach to an in-place storage.mode<- conversion, removing the prior special-case for single-row matrices.

Changes:

• Replace apply(predictions, 2, as.numeric) with storage.mode(predictions) <- "numeric" for integer matrices.
• Remove the nrow(predictions) == 1 special-case branch since storage.mode<- handles all dimensions uniformly.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.67%. Comparing base (a86c556) to head (989cce1).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #526      +/-   ##
==========================================
- Coverage   98.67%   98.67%   -0.01%     
==========================================
  Files          35       35              
  Lines        5905     5903       -2     
==========================================
- Hits         5827     5825       -2     
  Misses         78       78              

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[jgabry]

Thanks!