Create a separate program/process to scrape election status on all network sites

[samliew]

Currently, the setting up of this bot is done manually by changing environment vars in Heroku:

• Set CHAT_DOMAIN, if election is on another site on the Stack Exchange network
• Find election chat room, or default chat room for that site, set CHAT_ROOM_ID to that
• Set ELECTION_PAGE_URL to the active election page
• Set ELECTION_QA_URL, to override if the bot couldn't detect the correct site meta question link

If we can create a program to scrape all network sites' election pages, and store the status in a persistent database, we could potentially use this to automatically spin up a new instance for that site if a scheduled election is detected (usually the announcement on per-site meta comes later, although they are automating the election process - so look out for changes).

Maybe we don't need to find/scrape default chatroom urls for each site, since that is unlikely to change. The list can be fetched from https://api.stackexchange.com/docs/sites#filter=default&run=true, and the room with the most users & messages should be the default (e.g.: https://chat.stackexchange.com/?tab=site&sort=people&host=serverfault.com).

But it would be nice for the bot to detect the election chat room if there is one, using the following methods (in order):

• chat link from active election post
• go to https://chat.stackexchange.com/?tab=site&sort=people&host=serverfault.com and find a room with the word "election" in the room name with the most users
• last resort, a dev should be able to set this value

[samliew]

Election chat rooms can be automatically created by CMs and linked on the election page; announced here Automatically create a chat room

Just need to figure out the correct selector for the bot, if it needs changing.

[Oaphi]

Looks like the selector (line 167, election module) still matches the chat room URL, just checked that on an election page - so I think we are all set here.