ops(u13,fv-ml1): E2 in progress — nh3-dev app units, terminal origin via seat-host; fv-ml1 serial console + SOL logger staged

- configs/svos-apps/nh3-dev/: user units for svos-terminal (running),
  svos-postoffice, svos-miranda, svos-agent (installed, not yet started).
- configs/svos-front/Caddyfile: svos-terminal.phasefinal.com upstreams to
  https://svos-seathost.nh3.phasefinal.com now that app-terminal runs on nh3-dev.
- configs/fv-ml1-sol/: an nh3-dev user unit holding fv-ml1's BMC SOL session
  into the journal; fv-ml1's kernel console goes to ttyS1 (the SOL port,
  marker-tested) from its next boot (ZFSBootMenu commandline on zroot/ROOT).

configs/svos-apps/nh3-dev/svos-agent.service

@@ -0,0 +1,22 @@
+# eshpfi configs/svos-apps/nh3-dev/ (infra-ops, U13 2026-10-11): Miranda's agent connector (persona miranda), loopback
+# only; the gateway's svos plugin calls it at connector_url http://127.0.0.1:8407 with the shared Bifrost key.
+# FIRST start only: /etc/svos/env/agent-enroll.env carries SVOS_AGENT_ENROLL_SECRET; the connector enrolls, writes
+# /etc/svos/miranda/agent.credential (0600) and refuses to start while both exist, so delete the enroll file after.
+[Unit]
+Description=SVOS agent connector for Miranda (svos-agent)
+[Service]
+Type=simple
+UMask=0077
+Restart=on-failure
+RestartSec=3
+TimeoutStopSec=20
+WorkingDirectory=/etc/svos/miranda
+EnvironmentFile=-/etc/svos/env/agent-enroll.env
+Environment=SVOS_AGENT_CONFIG=/etc/svos/miranda/agent.toml
+Environment=SVOS_AGENT_LISTEN=127.0.0.1:8407
+Environment=SVOS_KERNEL_URL=https://svos-kernel.phasefinal.com
+Environment=SVOS_BIFROST_KEY_FILE=/etc/svos/miranda/bifrost.key
+Environment=SVOS_AGENT_CREDENTIAL_FILE=/etc/svos/miranda/agent.credential
+ExecStart=/opt/svos/current/apps-env/bin/svos-agent
+[Install]
+WantedBy=default.target