Replace python-jose with PyJWT and update its usage.

Switched the dependency from `python-jose` to `PyJWT` to handle JWT encoding and decoding. Updated related code to use `PyJWT`'s `InvalidTokenError` instead of `JWTError`. Also bumped the application version from `0.1.7` to `0.1.8`.

backend/app/core/deps.py

@@ -1,6 +1,6 @@
 from fastapi import Depends, HTTPException, status
 from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
-from jose import JWTError, jwt
+import jwt
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 from app.core.config import get_settings
@@ -20,7 +20,7 @@ async def get_current_user(
     token = credentials.credentials
     try:
         payload = jwt.decode(token, settings.jwt_secret_key, algorithms=[settings.jwt_algorithm])
-    except JWTError as exc:
+    except jwt.InvalidTokenError as exc:
         raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid token") from exc
 
     if payload.get("type") != "access":