There is a data dictionary but I believe you would need to ask support for it. It may be too much work for what you are trying to accomplish. Your requirements (replication of job activity screen) would be difficult for multiple reasons (group levels, occurance, status code vs status in GUI).Depending on your needs, you may be better off providing all users a read only view.
Depending on what you are looking for something like below might work. You would need to join jobmst and jobrun and possibly agent tables (nodmst,nodlstmst) if you want that detail. There is an cross reference of status in CMD line interface guide (example status 101= Completed Normally and status 103 is Completed Abnormally...
SELECT
dbo.jobrun.jobrun_proddt, dbo.jobmst.jobmst_prntname, dbo.jobmst.jobmst_name, dbo.nodlstms.nodlstmst_name, dbo.nodmst.nodmst_name,
dbo
.jobrun.jobrun_status, dbo.jobrun.jobrun_duration, dbo.jobrun.jobrun_fromtm, dbo.jobrun.jobrun_untiltm
FROM
dbo.jobmst INNER
JOIN
dbo
.jobrun ON dbo.jobmst.jobmst_id = dbo.jobrun.jobmst_id