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/backend/src/modules/messages/messages.repository.ts

@@ -14,6 +14,7 @@ import {
   or,
   type SQL,
 } from "drizzle-orm";
+import { config } from "../../shared/config/index.js";
 import { getDatabase } from "../../shared/database/index.js";
 import { mapMessageRow } from "../../shared/utils/messageMapper.js";
 import type {
@@ -23,12 +24,12 @@ import type {
 } from "./messages.schema.js";
 
 /**
- * Thread IDs to exclude from all message queries.
+ * Thread/channel IDs to exclude from all message queries.
  * Messages in these threads (e.g. bot/selfbot spam) are skipped
  * both at capture time (discord-gateway) and when serving data
- * (backend API).
+ * (backend API). Configured via EXCLUDED_THREAD_IDS and EXCLUDED_CHANNEL_IDS.
  */
-const EXCLUDED_THREAD_IDS = ["1522077685508083893"];
+const EXCLUDED_THREAD_IDS = config.EXCLUDED_THREAD_IDS;
 
 const logger = createChildLogger("messages.repository");