fix: restart HA daemons on install/remove; add regression test (#179)

pvedaemon/pveproxy picked up the patched PVE::Storage state, but
pve-ha-lrm/pve-ha-crm kept running against the pre-install state, so
HA-managed VMs on TrueNAS storage failed to start. They don't support
a `restart` subcommand (only start/stop/status), so they're restarted
via systemctl instead. Also switched every restart from `cmd && log
...` to bare statements — set -e does not fire on the left side of
&&, so a genuine restart failure was previously swallowed silently
instead of aborting the script.

Adds tests/test-restart-services.sh: sources the real postinst/postrm
against stub PVE binaries in CI to catch both classes of regression
(wrong subcommand, silently-swallowed failure) without needing a live
PVE cluster. Real HA-cluster validation is documented as a manual
runbook (RUNBOOK-001) since GitHub Actions can't run pve-ha-lrm/crm.

Bumps $VERSION to 3.2.4.

Fixes #179

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.github/workflows/build.yml

@@ -68,6 +68,11 @@ jobs:
             packaging/DEBIAN-multipath/postrm
           echo "Shell scripts OK"
 
+      - name: Test postinst/postrm service restarts
+        run: |
+          echo "==> Running tests/test-restart-services.sh..."
+          bash tests/test-restart-services.sh
+
   # ── Job 2: Build .deb ────────────────────────────────────────────────────────
   build:
     name: Build Package