refactor(ssh): consolidate real_ssh into ssh, remove duplication

real_ssh was a separate service name pointing to the same template and
behaviour as ssh. Merged them: ssh is now the single real-OpenSSH service.

- Rename templates/real_ssh/ → templates/ssh/
- Remove decnet/services/real_ssh.py
- Deaddeck archetype updated: services=["ssh"]
- Merge test_real_ssh.py into test_ssh.py (includes deaddeck + logging tests)
- Drop decnet.services.real_ssh from test_build module list

templates/cowrie/honeyfs/etc/shadow

@@ -0,0 +1,36 @@
+root:$6$rounds=4096$randomsalt$hashed_root_password:19000:0:99999:7:::
+daemon:*:19000:0:99999:7:::
+bin:*:19000:0:99999:7:::
+sys:*:19000:0:99999:7:::
+sync:*:19000:0:99999:7:::
+games:*:19000:0:99999:7:::
+man:*:19000:0:99999:7:::
+lp:*:19000:0:99999:7:::
+mail:*:19000:0:99999:7:::
+news:*:19000:0:99999:7:::
+uucp:*:19000:0:99999:7:::
+proxy:*:19000:0:99999:7:::
+www-data:*:19000:0:99999:7:::
+backup:*:19000:0:99999:7:::
+list:*:19000:0:99999:7:::
+irc:*:19000:0:99999:7:::
+gnats:*:19000:0:99999:7:::
+nobody:*:19000:0:99999:7:::
+systemd-network:*:19000:0:99999:7:::
+systemd-resolve:*:19000:0:99999:7:::
+messagebus:*:19000:0:99999:7:::
+systemd-timesync:*:19000:0:99999:7:::
+syslog:*:19000:0:99999:7:::
+_apt:*:19000:0:99999:7:::
+tss:*:19000:0:99999:7:::
+uuidd:*:19000:0:99999:7:::
+tcpdump:*:19000:0:99999:7:::
+landscape:*:19000:0:99999:7:::
+pollinate:*:19000:0:99999:7:::
+fwupd-refresh:*:19000:0:99999:7:::
+usbmux:*:19000:0:99999:7:::
+sshd:*:19000:0:99999:7:::
+systemd-coredump:!!:19000::::::
+lxd:!:19000::::::
+mysql:!:19000:0:99999:7:::
+admin:$6$rounds=4096$xyz123$hashed_admin_password:19000:0:99999:7:::