* fix(clv2): escape $HOME before pgrep -f in migrate-homunculus.sh
pgrep -f treats its argument as an extended regular expression, but the
running-observer guard interpolated $HOME unescaped. Paths containing regex
metacharacters (e.g. /home/user.name, /home/c++dev, /home/user (work)) made the
match over-broad or invalid, causing either a false negative (live observer
missed, migration proceeds and risks registry corruption) or a false positive
(migration blocked unnecessarily).
Escape the ERE metacharacters in $HOME via sed before building the pattern so
the home prefix is matched literally while the trailing .*observer-loop\.sh
regex is preserved. Portable across BSD and GNU sed.
Fixes#2301
* test(clv2): add regression test for migrate-homunculus.sh $HOME escaping
Guards the #2301 fix: extracts the script's sed escaping command and asserts
the resulting pgrep -f pattern matches the literal home path while no longer
over-matching a regex-expanded decoy (HOME=/home/user.name must not match
/home/userXname). Also pins that the guard uses escaped_home rather than $HOME
directly. Follows the existing clv2 shell-test convention in
tests/hooks/observe-entrypoint-allowlist.test.js.
Refs #2301
* test(clv2): skip migrate-homunculus escaping test on Windows
The test relies on POSIX bash/sed/grep -E semantics, which differ on the
Windows CI runners. Guard with the same process.platform === 'win32' early
exit used by tests/hooks/observe-subdirectory-detection.test.js so the
bash-dependent assertions only run on POSIX platforms.
Refs #2301
