feat(albok): personal/inbox wing on nh3-albok + /srv/nemi/inbox capture root on nh3-dev (unit 4.4 slice C, gate 2)

Prime ruled albok subsumes note intake (1530). The wing is like personal/notes
(albok-personal 1511, not service-restricted); health reads 7 wings ready.
Nemi's token was re-minted with read+write on the new wing and vaulted over
albok/token-nemi. /srv/nemi/inbox is lkraven:nemi-drop 2770 with a default ACL,
plus u:lkraven:rx on /srv/nemi, so Nemi reaches it from lkraven's user manager,
whose groups predate nemi-drop. Both paths are verified by the playbook.

servers/nh3-dev/README.md

@@ -229,3 +229,13 @@ Available to **every user/project** on this box — no per-home `playwright inst
   / `heid run` pollers) into Claude Code session orchestrators (heid commit
   `12aa5a9`); the `~/development/volva` dir + venvs are gone. `volva.service` had
   been crash-looping `203/EXEC`. Cleanup done by infra-ops at heid's request.
+
+## `/srv/nemi/inbox`: albok's drop-box (2026-10-13)
+
+Nemi (lkraven's `albok-nemi.timer`) ingests markdown dropped here into albok's `personal/inbox` wing, once per file;
+capture mode never tombstones, so a walked file may be moved away. Writers are group `nemi-drop` (lkraven,
+infra-ops). The dir is `lkraven:nemi-drop 2770` with a default ACL (u:lkraven, g:nemi-drop rwX), and `/srv/nemi`
+carries `u:lkraven:rx`.
+⚠ lkraven's systemd user manager started before `nemi-drop` existed, so Nemi gets in through those ACL entries
+for lkraven, NOT through the group. Do not "simplify" them away until lkraven's user manager has restarted.
+`playbooks/nh3-dev-nemi-inbox.yaml` verifies both paths.