feat: auth middleware, brain data layer, Valkey queue (P1-002/003/004) (#71)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/gateway/src/app.module.ts

@@ -1,10 +1,12 @@
 import { Module } from '@nestjs/common';
 import { HealthController } from './health/health.controller.js';
+import { DatabaseModule } from './database/database.module.js';
+import { AuthModule } from './auth/auth.module.js';
 import { AgentModule } from './agent/agent.module.js';
 import { ChatModule } from './chat/chat.module.js';
 
 @Module({
-  imports: [AgentModule, ChatModule],
+  imports: [DatabaseModule, AuthModule, AgentModule, ChatModule],
   controllers: [HealthController],
 })
 export class AppModule {}