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Markbook ERD
https://lucid.app/lucidchart/b45ed3cb936682fc-d086e3cb-48a04da2-8892b5af-2fc8fa6cf1b3e7534391e88d/edit?invitationId=inv_85610a138c36451f-5f947208-4c7044a9-9857bbde-b5455dcb2c15325b1c81e860&page=0_0#UXNX2FxalxT9#
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Markbook ERD
https://lucid.app/lucidchart/b45ed3cb936682fc-d086e3cb-48a04da2-8892b5af-2fc8fa6cf1b3e7534391e88d/edit?invitationId=inv_85610a138c36451f-5f947208-4c7044a9-9857bbde-b5455dcb2c15325b1c81e860&page=0_0#UXNX2FxalxT9#