Fix: Correct app_file path and SDK configuration for HF Spaces

- Fixed app_file path from 'src/app.py' to 'app.py' (root directory)
- Changed SDK from 'docker' to 'gradio' for proper Gradio app deployment
- This should resolve the 'missing app file' error on HF Spaces

.space/space.yaml

@@ -2,14 +2,14 @@ title: VedaMD - Medical Assistant
 emoji: 🏥
 colorFrom: blue
 colorTo: green
-sdk: docker
+sdk: gradio
 pinned: false
 fullWidth: true
 build:
   clearCache: true
   forceRebuild: true
 python_version: 3.10
-app_file: src/app.py
+app_file: app.py
 models:
   - sentence-transformers/all-MiniLM-L6-v2
   - cross-encoder/ms-marco-MiniLM-L-6-v2