Update knowledge files with corpus analysis and feedback system docs
- CLAUDE.md: added corpus-analysis.md to reference table, documented chair feedback system
- block-schema.md: added content_checklist constraint to block-yod
- legal-decision-lessons.md: added lessons 12-16 from corpus analysis (planning discussion, 5 subtypes, feedback system)
- SKILL.md: added section 12 (content checklists, planning discussion patterns, chair feedback)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>