`rad lfs init` previously only configured a push refspec for the
notes ref (`+refs/notes/rad-lfs/local:refs/notes/rad-lfs`) -- once
any explicit push refspec exists on a remote, git stops falling back
to push.default-driven behavior for a bare `git push rad`, so it only
ever pushed the notes mapping, never the branch. That's the exact
footgun that just caused a real "blog did not update" report: `git
push rad` (bare) after a commit only sent the notes ref, silently
leaving the commit itself unpushed.
Add a second push refspec, `+refs/heads/*:refs/heads/*`, mirroring
the existing `+refs/heads/*:refs/remotes/rad/*` fetch refspec already
configured. A bare `git push rad` now pushes every local branch and
the notes mapping together in one command.
Only takes effect once `rad lfs init` has been (re-)run with this
build -- it's an additive, idempotent config change via the existing
`ensure_refspec` helper, no migration/cleanup needed since there's no
stale conflicting entry to remove this time. Updated `rad lfs init`'s
own success/info messages plus README.md/LFS-IPFS.md/
radicle-lfs-transfer's README to match -- the "push gotcha" workaround
they documented is now the *old*-repository fallback path, not the
primary instructions.