Persist common data for closed session

[k82cn]

Motivation

Currently, the common data are managed in cache for a long time. It's better to persist it into "disk" for the closed session to release memory in worker node.

Function Specification

Persist common data of closed session.

Solutions

In executor manager, it should also watch the status of session. It should persis common data when the session is closed.

Additional context

N/A