fix: replace plt.style.use('seaborn') with 'seaborn-v0_8' for matplotlib 3.6+ compatibility

[aqn96]

Summary

Fix a matplotlib deprecation/breakage across 15 table_generator.py files in the DT, NN, and XGB modules.

Root Cause

Matplotlib 3.6 deprecated the 'seaborn' style name, and matplotlib 3.8+ removed it entirely. On modern environments (e.g., Ubuntu 24.04 with Python 3.12 and matplotlib 3.10), plt.style.use('seaborn') raises:

OSError: 'seaborn' not found in the style library

Fix

Replace plt.style.use('seaborn') with plt.style.use('seaborn-v0_8'), which is the renamed style and is compatible with both older and current matplotlib versions.

Affected Files

15 table_generator.py files across DT (6), NN (3), and XGB (6) modules.

Tested

• Python 3.12, matplotlib 3.10.8, Ubuntu 24.04 ARM
• DT/Type_4 end-to-end through BMv2 deployment on Iris dataset

Related: #8
See also: #7 (pandas fix for the same outdated dependency issue)