fix: dropbear/network boot ordering — dropbear starts without network

- dropbear: custom init removes 'need net', only needs localmount + bee-sshsetup
- bee-network: removed 'before dropbear' dependency
- bee-network.sh: removed set -e so single iface failure does not abort script

iso/builder/genapkovl-bee_debug.sh

@@ -82,8 +82,11 @@ if [ -d "$OVERLAY/root" ]; then
 fi
 
 mkdir -p "$tmp/etc/dropbear" "$tmp/etc/conf.d"
+# -R: auto-generate host keys if missing
+# no dependency on networking service — bee-network handles DHCP independently
 makefile root:root 0644 "$tmp/etc/conf.d/dropbear" <<EOF
 DROPBEAR_OPTS="-R"
 EOF
 
+
 tar -c -C "$tmp" etc usr root 2>/dev/null | gzip -9n > "$HOSTNAME.apkovl.tar.gz"