Add support for local files and optimized caching

Signed-off-by: Felipe Cardoso <felipe.cardoso@hotmail.it>

backend/app/core/config.py

@@ -1,17 +1,22 @@
+from typing import Optional
+
 from pydantic_settings import BaseSettings
 
 
 class Settings(BaseSettings):
-    # SFTP Settings
-    SFTP_HOST: str
-    SFTP_USER: str
-    SFTP_KEY_PATH: str = "~/.ssh/id_rsa"  # Default SSH key path
-    SFTP_PATH: str
+    # SFTP Settings (Optional)
+    SFTP_HOST: Optional[str] = None
+    SFTP_USER: Optional[str] = None
+    SFTP_KEY_PATH: Optional[str] = "~/.ssh/id_rsa"
+    SFTP_PATH: Optional[str] = None
     SFTP_PORT: int = 22
 
+    # Local Settings (Optional)
+    LOCAL_PATH: Optional[str] = None
+
     # API Settings
-    API_VER_STR: str = "/api/v1"
     PROJECT_NAME: str = "Training Monitor"
+    API_VER_STR: str = "/api/v1"
 
     class Config:
         env_file = ".env"