Agent host: SilverBullet serves the vault as its one space, behind Authelia

The operator chose single-space mode: the vault is mounted at /data, with
memory/ read-only over it, and there are no accounts or setup wizard;
Authelia in the operator's Caddy is the login. SB_NAME forces the mode, so
an empty vault can't boot the wizard. SilverBullet's own data folder is
gone. check now fails if the wizard could be open. The README says how to
make memory/ writable for a while and back.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J5Utyfzw7gF7UhjRDEtjTk

deploy/agent-host/caddy/nisse-memory.dongar.net.caddy

@@ -1,5 +1,7 @@
 # The vault's SilverBullet, for the operator's Caddy on docker.garrett-hall.com
 # (/opt/stacks). HTTPS from Caddy's usual automatic certificate; LAN only.
+# Out of date: the live site is behind Authelia and open beyond the LAN. This
+# copy is updated once the operator shares it.
 nisse-memory.dongar.net {
 	# Anyone outside the LAN gets nothing. Caddy still answers Let's Encrypt's
 	# checks, which it handles before the site's own routes.