Regenerate spell lists: multi-category classification + Retail spec fix

- Retail now has 2,841 spec-gated talents via TraitNodeGroupXTraitCond
- Spells now classified into abilities/buffs/debuffs AND talents simultaneously
  (isTalent=true spells appear in both their effect category and talents)
- Retail: 1,544 entries / MoP: 1,360 / TBC: 1,895 / Classic: 1,945

Generator: C:/repos/badrotations-claude/generate_spells.py

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: BrewingCoder

System/Lists/Expansions/Classic/Spells.generated.lua

@@ -3,7 +3,7 @@ if br.lists == nil then br.lists = {} end
 
 -- Generated by BreweryNav spell generator
 -- Source build : 1.15.8.66564
--- Extracted at : 2026-03-26T01:08:20Z
+-- Extracted at : 2026-03-26T10:00:52Z
 -- DO NOT EDIT  — regenerate from BreweryNav.Extractor.SpellIds
 
 br.lists.spells = {