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>

packages/shared/package.json

@@ -8,7 +8,9 @@
   "exports": {
     ".": "./dist/index.js",
     "./config": "./dist/config/index.js",
+    "./database/pool": "./dist/database/pool.js",
     "./database/schema": "./dist/database/schema.js",
+    "./database/init": "./dist/database/init.js",
     "./errors": "./dist/errors/index.js",
     "./logger": "./dist/logger/index.js",
     "./moderation-types": "./dist/moderation-types.js",
@@ -21,11 +23,13 @@
   },
   "dependencies": {
     "drizzle-orm": "^0.45.2",
+    "pg": "^8.13.0",
     "pino": "^9.0.0",
     "zod": "^4.4.3"
   },
   "devDependencies": {
     "@types/node": "^25.9.0",
+    "@types/pg": "^8.11.0",
     "pino-pretty": "^13.1.3",
     "typescript": "^5.9.3"
   }