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.

stacks/calibre-web-automated/compose.yaml

@@ -0,0 +1,45 @@
+# Calibre-Web-Automated — all-in-one replacement for the old
+# `calibre` + `calibre-web` pair. Upstream: https://github.com/crocodilestick/Calibre-Web-Automated
+#
+# The library lives on the NH3 / ESH NAS via NFS, so NETWORK_SHARE_MODE
+# must be on (disables SQLite WAL, which corrupts on NFS).
+#
+# All tunables live in .env — edit that, not this file.
+
+services:
+  calibre-web-automated:
+    image: crocodilestick/calibre-web-automated:${CWA_VERSION:-latest}
+    container_name: calibre-web-automated
+    restart: unless-stopped
+    environment:
+      - PUID=${PUID:-2000}
+      - PGID=${PGID:-2000}
+      - TZ=${TZ:-America/Los_Angeles}
+      - NETWORK_SHARE_MODE=${NETWORK_SHARE_MODE:-true}
+      - CWA_PORT_OVERRIDE=${CWA_PORT:-8083}
+      - HARDCOVER_TOKEN=${HARDCOVER_TOKEN:-}
+    ports:
+      - "${CWA_PORT:-8083}:${CWA_PORT:-8083}"
+    volumes:
+      - ${CWA_CONFIG_DIR}:/config
+      - ${CWA_INGEST_DIR}:/cwa-book-ingest
+      - ${CWA_LIBRARY_DIR}:/calibre-library
+    healthcheck:
+      test: ["CMD-SHELL", "wget -q --spider http://localhost:${CWA_PORT:-8083} || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 60s
+    networks:
+      - tnet
+    labels:
+      - homepage.group=Media
+      - homepage.name=Calibre-Web-Automated
+      - homepage.icon=si-calibreweb
+      - homepage.description=eBook library + auto-ingest (esh)
+      - homepage.href=http://10.0.50.45:${CWA_PORT:-8083}
+
+networks:
+  tnet:
+    name: traefik-net
+    external: true