Fix Space startup: defer model loading, fix sdk_version

- Remove model preloading at startup to prevent Gradio from never starting
when model download/load fails; models are loaded lazily via UI selector
- Change sdk_version from 5.0.0 to 4.44.1 (valid stable release)

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

README.md

@@ -4,7 +4,7 @@ emoji: 🎨
 colorFrom: purple
 colorTo: pink
 sdk: gradio
-sdk_version: "5.0.0"
+sdk_version: "4.44.1"
 python_version: "3.10"
 app_file: app.py
 pinned: false

app.py

@@ -216,12 +216,6 @@ def init_interface(opt, *args, **kwargs) -> None:
 
 if __name__ == '__main__':
     opt = app_options()
-    try:
-        models = get_available_models()
-        load_model(models[0])
-        switch_extractor(default_line_extractor)
-        switch_mask_extractor(default_mask_extractor)
-        interface = init_interface(opt)
-    except Exception as e:
-        print(f"Error initializing interface: {e}")
-        raise
+    switch_extractor(default_line_extractor)
+    switch_mask_extractor(default_mask_extractor)
+    init_interface(opt)