Update sqlalchemy to latest version

[yadavsahil197]

This will require us to remove usage of autocommit=True when initializing engine. So we'll need to explicitly commit a change/transaction.

[rishabh-bhargava]

This will be useful to not have a pinned old version: https://github.com/refuel-ai/refuel-oracle/blob/3f2d92909bba7c0fe9d54a58e16b32a4f2d129b7/requirements.txt#L12