Fixes#13043
The usages of the table mostly already correctly handled if we don't
have old entries, as that was needed when we first added the table.
I arbitrarily set the prune time to 30 days. The only use for old
entries is for sync streams that haven't synced since then, and we
should very rarely see sync streams that haven't been used in 30 days.
Reviewable commit-by-commit.
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Co-authored-by: Olivier 'reivilibre' <oliverw@element.io>
Co-authored-by: Olivier 'reivilibre' <olivier@librepush.net>
Erik Johnston
2a8285931e