feat(core): enable REAL-MODE - activated live API reasoning and removed mock fallbacks

fix(ocr): apply universal CJK filter and early input sanitization

feat(ml): deploy expert symbolic solver and unified math_utils

fix: (1) Aggressive CJK filter per OCR item, (2) Smart SymPy-based simulation with per-agent variation, (3) 6-level verdict system with agent divergence detection

feat: Add Gradio app.py and consolidated MVM2 core modules for HF Space deployment