feat: implement refresh token functionality; update authentication and token models; add tests for refresh endpoint

app/api/deps.py

@@ -118,6 +118,9 @@ async def get_current_user(
         sub = payload.get("sub")
         if sub is None:
             raise credentials_exception
+        scope = payload.get("scope", "access")
+        if scope != "access":
+            raise credentials_exception
         user_id = int(sub)
     except (jwt.PyJWTError, TypeError, ValueError):
         raise credentials_exception from None