I thought ruff check would also format, but it doesn't.
This runs ruff format in CI and dev scripts. The first commit is just a
run of `ruff format .` in the root directory.
When returning receipts in sliding sync for initial rooms we should
always include our own receipts in the room (even if they don't match
any timeline events).
Reviewable commit-by-commit.
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Co-authored-by: Eric Eastwood <eric.eastwood@beta.gouv.fr>
