Analyze Mainframe documentation

In preparation for knowledge handover session from Mainframe support team review and analyze the available mainframe documentation first so that we have a better understanding of the existing system before the sessions. This will help us make the handover discussions more focused and allow us to ask more specific questions.

[Mainframe documents](https://bcgov.sharepoint.com/teams/13651/Shared%20Documents/Forms/AllItems.aspx?id=%2Fteams%2F13651%2FShared%20Documents%2FGeneral%2FInternal%2FAll%20Teams%20%26%20Products%2FEntities%2FEntities%20migration%20from%20Mainframe%2FMainframe%20documents&viewid=c31c6091%2D8318%2D4d4a%2D85cd%2Df0a5267f721a&csf=1&ovuser=6fdb5200%2D3d0d%2D4a8a%2Db036%2Dd3685e359adc%2CNeeraja%2EKumar%40gov%2Ebc%2Eca&TeamsCID=a5d4bb8e%2Def34%2D422d%2Dbc65%2D7cd664686e6f&OR=Teams%2DHL&CT=1781640362615&clickparams=eyJBcHBOYW1lIjoiVGVhbXMtRGVza3RvcCIsIkFwcFZlcnNpb24iOiI0OS8yNjA1MTQxNjcxMyIsIkhhc0ZlZGVyYXRlZFVzZXIiOmZhbHNlfQ%3D%3D&CID=75431ea2%2D1055%2Dd000%2D94e8%2De3a346af2ecb&cidOR=SPO&FolderCTID=0x01200051342836BAE91C48B0766AFDDAC1923F)