OptimalBinningWoE 1.0.7

• UBSAN Investigation Fix (2026-01-27) - Addressing persistent memory safety errors:

  • Temporarily disabled ob_categorical_sketch tests: The sketch-based categorical binning
    algorithm is under investigation for persistent UBSAN memory errors that appear to be
    related to cache invalidation timing in GitHub Actions CI environment.

  • Removed MergeCache class from OBC_Sketch_v5.cpp: Completely removed the caching
    mechanism and implemented on-the-fly divergence calculation to eliminate potential
    memory corruption sources.

• Affected Files:

  • src/OBC_Sketch_v5.cpp: MergeCache class removed, divergence calculated on-the-fly
  • tests/testthat/test-categorical-all.R: Sketch tests temporarily commented out

• No API Changes: Fully backward compatible with v1.0.6.