Add SStudentConfig and set_foreign_id to Student
[lib] streamer object
[js] handle SSE
[controller] update  EPS and pub to postgresql
[routes] for realtime controller
[view] grading
[controller/live] publish EPS
[controller] exans
WIP: Save sstudent search in session
[frontend] Add prefill to student search fields based on session
Merge pull request #275 from Genshin/add_student_config

Add StudentConfig and set_foreign_id to Student
Merge pull request #274 from Genshin/grading_live_straming

Grading live straming
Merge remote-tracking branch 'origin/master' into revise_student_views