journal: record Hetzner rescue recovery for cc-ci

cc-ci-plan/JOURNAL.md

@@ -161,3 +161,11 @@ patched the orchestrator launcher the same way for the next session.
   is patched to use attach mode for opencode orchestrator sessions too.
 - A runtime systemd override was applied at `/run/systemd/system/opencode-web.service.d/override.conf`.
   Persist the final service environment with `nixos-rebuild` when convenient.
+
+### Event 13:46 — recovered cc-ci from emergency mode via Hetzner rescue
+`cc-ci` stopped booting cleanly after a `nixos-rebuild test --flake path:/root/builder-clone#cc-ci`
+activation. Hetzner rescue + VNC console showed emergency mode; mounted journal showed `/boot` waiting on
+`/dev/disk/by-label/ESP`. The immediate repair was restoring the missing FAT label on `/dev/sda15`
+(`fatlabel /dev/sda15 ESP`) and rebooting normally. Follow-up investigation item: determine why the
+wrong boot layout was activated and prevent future use of `#cc-ci` on the Hetzner server when the
+correct host target is `#cc-ci-hetzner`.