Initial: backup/restore scripts, README

- backup.sh: weekly cron script for PVE1+PVE2
- restore.sh: interactive disaster recovery wizard
- README.md: step-by-step recovery guide for both nodes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,9 @@
+# Never store private keys or secrets
+*.key
+priv/
+id_rsa
+*.pem
+*.pfx
+
+# Logs
+*.log