feat: Implement file cleanup middleware for automatic old file deletion using local and Cloudinary storage providers.

test_output_2.txt

@@ -0,0 +1,31 @@
+  console.log
+    [FileCleanup] Cleaning up old file: /uploads/test/old-image.png
+
+      at Proxy.delegate.update (src/prisma/file-cleanup.helper.ts:49:25)
+
+FAIL test/file-cleanup.spec.ts
+  File Cleanup Middleware
+    × should delete old file when user image is updated (1008 ms)
+
+  ● File Cleanup Middleware › should delete old file when user image is updated
+
+    expect(received).toBe(expected) // Object.is equality
+
+    Expected: false
+    Received: true
+
+      69 |     // 5. Verify old file is gone
+      70 |     const fileExists = fs.existsSync(oldFilePath);
+    > 71 |     expect(fileExists).toBe(false);
+         |                        ^
+      72 |
+      73 |     // 6. Verify File record is gone
+      74 |     const fileRecord = await prisma.file.findFirst({
+
+      at Object.<anonymous> (test/file-cleanup.spec.ts:71:24)
+
+Test Suites: 1 failed, 1 total
+Tests:       1 failed, 1 total
+Snapshots:   0 total
+Time:        1.809 s
+Ran all test suites matching test/file-cleanup.spec.ts.