[WIP] queue_job: improve memory usage

[AnizR]

⚠️ This is not yet ready

It is an attempt to improve the memory usage of queue_job.

I recently had a case where I had one group of 1000 jobs chained to another of 1000 jobs.

I realized that queue job was using a lot a memory when accessing depends_on and reverse_depends_on.

While, in fact, we could just search and fetch the uuid instead of the entire recordset.

[OCA-git-bot]

Hi @guewen,
some modules you are maintaining are being modified, check this out!