Move non-configurable options from config to state

[argiepiano]

There are a few non-configurable options currently saved as json files that may be better suited for state saving. Reading and writing json files is expensive and slow, and may be causing some of the unusual behavior mentioned here in Zulip.

[herbdool]

@argiepiano I found the hash which is better stored in state (new PR). I'm not sure what else. The recently merged PR also set last_optimize to state.

[argiepiano]

@herbdool I left a comment. Also, please set the hash to state in update 1000.

[argiepiano]

Sorry, it won't be necessary to store this hash in update 1000, since this is done on page request

[argiepiano]

But... we should get rid of the config storage of the hash in that update hook.

[herbdool]

@argiepiano okay done.

[argiepiano]

LGTM