feat(gateway): wire adapter factories + DI tokens alongside existing providers

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/gateway/src/database/database.module.ts

@@ -1,8 +1,12 @@
 import { Global, Inject, Module, type OnApplicationShutdown } from '@nestjs/common';
 import { createDb, type Db, type DbHandle } from '@mosaic/db';
+import { createStorageAdapter, type StorageAdapter } from '@mosaic/storage';
 
 export const DB_HANDLE = 'DB_HANDLE';
 export const DB = 'DB';
+export const STORAGE_ADAPTER = 'STORAGE_ADAPTER';
+
+const DEFAULT_DATABASE_URL = 'postgresql://mosaic:mosaic@localhost:5432/mosaic';
 
 @Global()
 @Module({
@@ -16,13 +20,24 @@ export const DB = 'DB';
       useFactory: (handle: DbHandle): Db => handle.db,
       inject: [DB_HANDLE],
     },
+    {
+      provide: STORAGE_ADAPTER,
+      useFactory: (): StorageAdapter =>
+        createStorageAdapter({
+          type: 'postgres',
+          url: process.env['DATABASE_URL'] ?? DEFAULT_DATABASE_URL,
+        }),
+    },
   ],
-  exports: [DB],
+  exports: [DB, STORAGE_ADAPTER],
 })
 export class DatabaseModule implements OnApplicationShutdown {
-  constructor(@Inject(DB_HANDLE) private readonly handle: DbHandle) {}
+  constructor(
+    @Inject(DB_HANDLE) private readonly handle: DbHandle,
+    @Inject(STORAGE_ADAPTER) private readonly storageAdapter: StorageAdapter,
+  ) {}
 
   async onApplicationShutdown(): Promise<void> {
-    await this.handle.close();
+    await Promise.all([this.handle.close(), this.storageAdapter.close()]);
   }
 }