refactor: large codebase cleanup - consolidate schemas, migrate to Drizzle ORM, extract frontend components, modernize Docker builds

- Consolidate all DB schema definitions into packages/shared as single source of truth
- Migrate backend from raw SQL to Drizzle ORM across all modules
- Extract frontend inline UI into separate component files
- Refactor discord-gateway circuitBreaker into conversationState + moderationState
- Convert messageStore to Proxy singleton pattern
- Add validateBody/validateQuery middleware + Zod schemas for API endpoints
- Modernize Docker builds with multi-stage + pnpm deploy
- Migrate CI/CD from deployment to image-based pipeline
- Remove 60+ unused/dead files (~15K lines)
- Update color scheme from sky-blue to teal-cyan
- Move DB connection management to @bete/shared/database

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

services/discord-gateway/src/modules/ai-moderation/conversationContext.ts

@@ -28,7 +28,7 @@ function formatTimestamp(ms: number): string {
 }
 
 /**
- * Estimates token count for a string (pessimistic approximation for Indonesian slang & JSON overhead)
+ * Estimates token count for a string using tiktoken for accurate counting
  */
 export function estimateTokens(text: string): number {
   // Use tiktoken for accurate token counting (+15 overhead for JSON structure)