Is entering information about company loans and financial liabilities into the Oracle system considered unlawful (haram), knowing that these companies operate in permissible fields, and is it obligatory to leave the job if it is unlawful?

We have no knowledge of the interpretation of dreams and visions, but legal rulings are not derived from them. The vision of anyone other than prophets does not form the basis for a legal ruling.

Your work appears to be permissible, as long as you are only entering information for companies operating in permissible fields, and you are not entering data for banks or insurance companies.