Refactor app.py to include automatic installation of curpo model dependency and remove redundant subprocess import

app.py

@@ -1,3 +1,11 @@
+import subprocess
+import sys
+
+subprocess.check_call([
+    sys.executable, "-m", "pip", "install", "-e", 
+    "./extern/CUT3R/src/croco/models/curope"
+])
+
 from typing import List, Literal
 from pathlib import Path
 from functools import partial
@@ -16,13 +24,7 @@ from PIL import Image
 from utils import tensor_to_pil, encode_vae_image, encode_image, get_default_intrinsics, load_img_and_K, transform_img_and_K
 import os
 import glob
-import subprocess
-import sys
 
-subprocess.check_call([
-    sys.executable, "-m", "pip", "install", "-e", 
-    "./extern/CUT3R/src/croco/models/curope"
-])
 
 
 CONFIG_PATH = "configs/inference/inference.yaml"