feat(ai-moderation): personality-rich user/channel profiling & memory-aware analysis
- moderationPrompt.ts: Add PERSONALITY & MEMORY section instructing LLM to
use user_profile and channel_culture in analysis, with 3 new few-shot
examples (normal profile use, deviation detection, don't overfit)
- userProfileLearner.ts: Richer personality summary prompt — asks for
communication style, passion topics, unique habits/signature traits,
social dynamics, and writes in warm observer prose
- cultureLearner.ts: Richer channel culture summary — asks for 'vibe',
inside jokes, social norms, dynamics. Writes in anthropologist style