Add Smart Notes AI analysis and Mento Memory with user approval.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/ai/ai.module.ts

@@ -0,0 +1,9 @@
+import { Global, Module } from '@nestjs/common';
+import { AiService } from './ai.service';
+
+@Global()
+@Module({
+  providers: [AiService],
+  exports: [AiService],
+})
+export class AiModule {}