https://docs.google.com/spreadsheets/d/1rWreajvkkNTqXsPkS9wE0FFcRpOwaZMvDaWixGUGMyk/edit?gid=0#gid=0 https://sketchboard.me/hEPgL1t1DxIw https://app.diagrams.net/?src=about#HNotFound-Team%2FCoreChain-Server%2Fdevelopment%2FModels%2Fdatabase-model.drawio#%7B"pageId"%3A"6lRMdNZCeuYs8_WIxGct"%7D https://www.figma.com/board/sVEt1ufA26bijkejcH27nQ/Human-Resource-Management-System?node-id=0-1&p=f&t=scq6Y4EQsNqPql4b-0