fix: chmod SSH host keys after restore (HF loses permissions)

entrypoint.py

@@ -167,6 +167,10 @@ def restore():
     else:
         log("── RESTORE: no package list")
 
+    # Fix SSH key permissions (HF dataset doesn't preserve permissions)
+    sh("chmod 600 /etc/ssh/ssh_host_*_key 2>/dev/null")
+    sh("chmod 644 /etc/ssh/ssh_host_*_key.pub 2>/dev/null")
+
     # Restart sshd to pick up restored host keys
     sh("pkill sshd")
     time.sleep(1)