calibre: replace with Calibre-Web-Automated on esh-docker-vm

Retire the linuxserver.io calibre + calibre-web pair. CWA
(crocodilestick/calibre-web-automated) is an all-in-one: combined web UI
with Calibre backend, auto-ingest via drop folder, scheduled metadata
maintenance — single container on :8083.

- Reuses the existing library at /mnt/books/calibre/calibre_library
  (NFS) and the existing calibre-web config at /opt/docker/conf/calibre-web,
  so user accounts and the book catalogue carry over.
- Requires NETWORK_SHARE_MODE=true (library is on NFS; SQLite WAL would
  corrupt otherwise).
- New drop-zone at /mnt/books/calibre/ingest; files placed there are
  ingested into the library and then removed.
- Loses the LSIO desktop Calibre GUI (ports 8082/8181/8281) — run
  Calibre locally if you need the desktop UI.

Old compose dirs (/opt/docker/compose/{calibre,calibre-web}) removed on
esh-docker-vm; old images can be pruned at leisure.

servers/esh-docker-vm/README.md

@@ -44,8 +44,7 @@ General-purpose Docker host at the **ESH home-lab site** (`esteban.net` / `10.0.
 | homeassistant | macvlan `10.0.50.46:8123` | Home automation (direct LAN IP via macvlan on `ens18`) |
 | esphome | host net / 6052 | ESPHome firmware dashboard |
 | mosquitto | 1883 | MQTT broker |
-| calibre | 8082 / 8181 / 8281 | Ebook server |
-| calibre-web | 8083 | Ebook web UI |
+| calibre-web-automated | 8083 | All-in-one ebook library + web UI; replaced `calibre` + `calibre-web` pair on 2026-04-20 |
 | paperless-ngx (+ redis broker + volume-backup sidecar) | 8200 | Document archive; Postgres on `10.0.50.60:5432` |
 | pgadmin (+ volume-backup sidecar) | 5050 | Postgres admin UI |
 | drawio | 8087 / 8447 | Diagram editor |