chore: add arche-test.ini OS fingerprint smoke-test fleet

arche-test.ini

@@ -0,0 +1,40 @@
+# arche-test.ini
+# OS fingerprint smoke-test fleet.
+#
+# One group per OS family, each spinning up 2 deckies.
+# Deploy with:
+#   sudo .venv/bin/decnet deploy --config arche-test.ini --dry-run
+#   sudo .venv/bin/decnet deploy --config arche-test.ini --interface eth0
+#
+# After deploy, verify with:
+#   sudo nmap -O --osscan-guess <ip>
+#   sudo p0f -i <iface> -p
+# ---- Linux (TTL 64, timestamps on, ECN offer) ----
+[os-linux]
+nmap_os=linux
+services=ssh,http
+amount=2
+
+# ---- Windows (TTL 128, timestamps off, no ECN) ----
+[os-windows]
+nmap_os=windows
+services=smb,rdp
+amount=2
+
+# ---- BSD (TTL 64, timestamps on, no ECN) ----
+[os-bsd]
+nmap_os=bsd
+services=ssh,http
+amount=2
+
+# ---- Embedded (TTL 255, timestamps off, no SACK, no window scaling) ----
+[os-embedded]
+nmap_os=embedded
+services=snmp
+amount=2
+
+# ---- Cisco (TTL 255, timestamps off, no SACK, ip_no_pmtu_disc on) ----
+[os-cisco]
+nmap_os=cisco
+services=snmp
+amount=2