feat: add keep-alive GitHub Action for Hugging Face Space and remove redundant startup model warm-up

feat: implement robust FaceNet weights download from Hugging Face to bypass unreliable DeepFace upstream sources

implement thread-safe FaceNet model initialization and pre-bake weights into Docker image

Fix HF deployment timeout by setting HF_HUB_OFFLINE=1

feat: Implement facial similarity checks for student registration and photo updates, and enhance frontend error handling and database connection resilience.

Update Python dependencies.

feat: Conditionally initialize database connection pool with error handling and raise an HTTP exception if not configured.

chore: Remove unnecessary comment from `init_db.py`.

feat: add Hugging Face Spaces metadata to README and simplify Dockerfile dependency from `libgl1-mesa-glx` to `libgl1`.

Implemented the first version of the application, handled the UI, face recognition, and database handling