This commit includes updates to the SQL tests for the database layer handling memberships and invitations. Test cases are improved and expanded. It also introduces some changes to the underlying schema, including creation of new indices on the 'accounts' table and several adjustments to function definitions with regard to how user IDs are accessed. Also, some views related to user accounts are redefined for better data handling.
Extended the account ownership transfer tests and implemented several updates. This includes transferring the ownership only to an existing account member, sorting team members based on role hierarchy and whether a member is the primary owner. In the permissions check, prevented non-members from creating invitations and enhanced the styling of role badges depending on if they are custom or not.
New test files for database functionalities like transfer of ownership, schema conditions, and updating roles have been added. Changes have also been made in the schema.sql file for checking the role hierarchy levels and updating rules for permissions. Modifications in account permissions test have also been performed for more accuracy.
