migrate: Booklore → Grimmory on new LXC 130

Grimmory (grimmory-tools/grimmory) is the community fork/successor of
Booklore. Moving it off the shared apps LXC (105) onto a dedicated
container (130, 192.168.8.213) to avoid the Portainer-managed stack
footgun that wiped mariadb in April.

- containers/130-grimmory.md: new container doc with compose layout,
  Authentik OIDC notes (PKCE/Public client), media-GID setup
- plans/2026-06-29-grimmory-migration.md: step-by-step runbook for
  DB dump/restore, LXC provisioning, Caddy cutover, Authentik update
- inventory.yaml: add grimmory LXC 130
- containers/105-apps.md: remove Booklore section + hostname entry
- containers/index.md: update 105 row; add 130 row
- infrastructure/media-permissions.md: add LXC 130; update Booklore→Grimmory refs
- README.md: update 105 row; add 130 row

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

infrastructure/media-permissions.md

@@ -37,7 +37,7 @@ Every LXC that mounts `/mnt/library` participates in a shared `media` group with
 - `/etc/subgid` has `root:100000:65536` AND `root:10000:1` (second line required for unprivileged LXCs to receive GID 10000).
 - Shared subtrees owned `:media` mode `2775` (drwxrwsr-x, setgid):
   - `movies`, `tv`, `music`, `anime`, `podcasts` — jellyfin libraries
-  - `audiobooks`, `audiobookshelf-metadata`, `books`, `comics` — audiobookshelf / booklore
+  - `audiobooks`, `audiobookshelf-metadata`, `books`, `comics` — audiobookshelf / grimmory
   - `downloads` — \*arr stack output
   - `images` — photoprism / immich / mulita
   - `roms` — emu frontends
@@ -61,6 +61,7 @@ Every LXC that mounts `/mnt/library` participates in a shared `media` group with
 | 119 | [sophia](../containers/119-sophia.md)         | priv | www-data                                      |
 | 120 | [mule-images](../containers/120-mule-images.md) | priv | www-data                                    |
 | 122 | [arriman](../containers/122-arriman.md)       | priv | www-data, audiobookshelf, radarr, sonarr, lidarr, prowlarr, qbittorrent, bazarr, jellyseerr, mylar, jackett, overseerr, plex, arr |
+| 130 | [grimmory](../containers/130-grimmory.md)     | priv | Docker container uses `GROUP_ID=10000` env var (linuxserver pattern) — no in-LXC group needed |
 
 > Some entries from earlier snapshots — 100 (arr-yunohost), 107 (marimo), 109 (syncthing), 110 (photoprism), 112 (immich), 116 (heaper) — referenced LXCs that have since been destroyed. See [containers/index](../containers/index.md#recently-destroyed-kept-for-archaeology).
 
@@ -68,7 +69,7 @@ Config backups: `/root/101.conf.bak.*`, `/root/109.conf.bak.*` (109 destroyed 20
 
 ## Gotchas
 
-- **[apps (105)](../containers/105-apps.md) is a Docker host.** Adding `media` to the LXC alone is *not* enough for Docker containers inside. Each Docker container needs its GID passed in explicitly: `--group-add 10000` or `user: "<uid>:10000"` in compose. Booklore, audiobookshelf-in-docker, etc. need this per-container.
+- **[apps (105)](../containers/105-apps.md) and [grimmory (130)](../containers/130-grimmory.md) are Docker hosts.** Adding `media` to the LXC alone is *not* enough for Docker containers inside. Each Docker container needs its GID passed in explicitly: `--group-add 10000`, `user: "<uid>:10000"`, or `GROUP_ID=10000` (linuxserver images) in compose. Grimmory, audiobookshelf-in-docker, etc. need this per-container.
 - **`pct exec` does NOT run initgroups.** So `pct exec <id> -- id` shows only the primary group. For interactive verification, use `pct exec <id> -- sudo -i -u root id` or `su - <user> -c id`. Real systemd services work fine.
 - **systemd `User=root`** skips initgroups — explicit `SupplementaryGroups=media` drop-in needed.
 - **`pct restore`** or template rebuilds wipe in-container group membership and unprivileged-LXC idmap blocks. Re-apply from this page.