Extract spell effect mappings from Dictionaries.cs into spell_effects.json.
During item ingestion, compute_base_values() reverses active enchantment
effects to get true base stats:
- base_armor_level: armor without Impenetrability buffs
- base_max_damage: damage without Blood Drinker buffs
- base_attack_bonus: attack without Heart Seeker buffs
- base_melee_defense_bonus: defense without Defender buffs
- base_elemental_damage_vs_monsters: elemental without Spirit Drinker
- base_mana_conversion_bonus: mana conv without Hermetic Link
New columns in ItemCombatStats, exposed in search CTEs.
Frontend: Base Armor and Base Dmg columns (hidden by default, toggle on).
Requires ALTER TABLE migration before deploy.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
