site.getsitepackages()[0] returns /usr/local/lib/python3.11/dist-packages/ on
TrueNAS 25.x but middlewared lives in /usr/lib/python3/dist-packages/.
sitecustomize.py was installed to the wrong directory and Python never loaded it.
Fix: derive SITE_PKG from middlewared.__file__ so the overlay and sitecustomize.py
land in the correct directory.
Also add direct patching of b2.py and restic.py in the overlay as the primary
backend approach — more reliable than an import hook since it works regardless
of Python's site initialisation configuration. apply.sh now also writes
hook_status.json at boot time so 'verify' shows OK without requiring a backup run.
Also fixes incorrect middlewared log path in README (/var/log/middlewared/middlewared.log
→ /var/log/middlewared.log) and simplifies the verify troubleshooting note.
flan
f556746310