Revert "Initial check-in - DB scripts and ERD"

This reverts commit 57e655cb9e846b261beb81be9a95206a3f572c6a.
Revert "Revert "Initial check-in - DB scripts and ERD""

This reverts commit 1424cbbba8243a09bff5b4b792633e4d5672c9bf.
Revert "Revert "Revert "Initial check-in - DB scripts and ERD"""

This reverts commit 6539869fb8f34a0f6a60c8c4778c4ea291797cec.