Improve Logging for spacemember crud

[kobergj]

We have repeated reports where users fail to add/update/remove another user in a space but the error is not properly logged. We need concise error messages that tell what went wrong.

• graph service needs to log all errors with as much information as it has.
• double check if errors are logged properly in storage-users service
• simulate an error and make sure required information to fix it is logged.

NOTE: The scope of this ticket is only the CREATE/UPDATE/DELETE endpoints for Space Membership.