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/autoDeleteManager.ts

@@ -1,7 +1,7 @@
 import { createChildLogger } from "@bete/shared/logger";
 import type { Client, PermissionString } from "discord.js-selfbot-v13";
 import { config } from "../../shared/config/config.js";
-import { createModerationAction } from "../message-capture/messageStore.js";
+import { messageStore } from "../message-capture/messageStore.js";
 import type { MessageRecord } from "../message-capture/types.js";
 import { isEligibleForAutoDelete } from "./autoDeleteEligibility.js";
 import { logDeletionToChannel } from "./autoDeleteLogger.js";
@@ -65,7 +65,7 @@ async function logAutoDeleteAttempt(
   result: AutoDeleteResult,
 ): Promise<void> {
   try {
-    await createModerationAction({
+    await messageStore.createModerationAction({
       message_id: message.id,
       user_id: message.user_id,
       guild_id: message.guild_id,