Separation of Scheduler and Worker

[Himenon]

This PR solves the following two problems.

When using docker-compose,

• problem canceling running queries #1743
• Query schedule execution does not work

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Background

When I used docker-compose.production.yaml, I faced a problem that no query was executed.

Apparently, the Worker seemed to have not worked well.

I simply used it as ./bin/docker-entrypoint worker but now it is no longer scheduled to run, so I added a container for scheduler.

Are there other ideas to solve these problems?

thanks.

[r-kells]

spelling

[arikfr]

I don't think we need this change in docker-compose.yml as this is a development setup that should be light on processes.

As for docker-compose.production.yml see #3251.

Considering the above, I'm closing this, but thank you for the effort!