For stable commits, use the same timestamp as the CLI tests do.
This preserves that commits that are created in the Signed References
module appears as "now" in the output.
In order to allow automatic migration to the feature level 'parent',
introduce a way to force writing signed references, even if the
user-controlled refs are unchanged.
To detect the special case of a Signed References history with a single
and root commit (which would otherwise be detected as feature level
'parent', even though the `refs/rad/sigrefs-parent` ref cannot be
written), keep information about the parent commit in `SignedRefs`.
The output of `rad inspect --sigrefs` is changed to match the more
strict interpretation of the feature level for histories with a single
and root commit.
The previous implementation used 'all' as the default for scope, this
could lead to surprising behaviour where a user would fetch all
references for cloned and seeded repositories. Instead have a progressive,
safe by default value - where it fetches only 'followed' references. Later
a user can decide to set the scope to 'all'. NOTE: the default policy
scope was not changed from 'all' and is intended to be changed at a
later date.
Pay more attention to when a Node ID is displayed in compact form. As
this was sometimes used to save space, e.g. in `rad node status` in
combination with long node addresses (like .onion names), also implement
a compact format for node addresses and use that instead in some cases.
Progress notifications in spinners keep the short form.