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.
The large update includes optimization for account and role management. The code has been revised for better readability and efficiency. Changes include formatting updates and enhancements to the creation and handling of accounts, roles, and memberships. Privacy settings have also been adjusted to provide more secure handling of user data. Code comments have been updated for better understanding of the functions.
