feat(images): pin pihole, jackett and plex to the digests already running; Renovate follows them

pihole/pihole (no tag)               -> 2026.10.0               sha256:d3413471...
lscr.io/linuxserver/jackett:latest   -> v0.24.2865-ls7          sha256:4fcf3cc2...
plexinc/pms-docker:latest            -> 1.43.4.10903-e5521bd8c  sha256:e0ab2739...

Each tag was resolved against its registry and matched the pods' imageID, so the image is
unchanged (the pod template string does change, so Flux rolls the three workloads).

renovate.json5: regex versioning for jackett (-lsN) and plex (build-hex); jackett is looked
up on ghcr.io via overridePackageName, because lscr.io is capped at dockerMaxPages=20 pages
and jackett's 32k tags put the running one at #31,980 (dry run proposed nothing without it);
jackett weekly (13 builds in 12 days); pihole deliberately unheld, year rollover = major.
Stale "publishes only latest" prose fixed in renovate.json5 and three runbooks.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

catalog/jackett.yaml

@@ -16,7 +16,7 @@
 name: jackett
 kind: container
 source:
-  image: lscr.io/linuxserver/jackett:latest
+  image: lscr.io/linuxserver/jackett:v0.24.2865-ls7
 exposure: internal              # LAN-only web UI at jackett.${BASE_DOMAIN} (docs/13 row 4; R-DNS/R-NET)
 egress: vpn                     # indexer scraping via node PIA tunnel + kill-switch (docs/03; ADR-0015; R-NET-05/06)
 storage:
@@ -70,7 +70,8 @@ auth:
     - ^/api/
 update:
   channel: stable               # R-UPD-01
-  range: ">=0.22.0"             # stay on the Jackett 0.22.x stable line
+  range: ">=0.22.0"             # floor only, no ceiling (0.24.x runs as of 2026-10-30; Jackett has no
+                                # major line to hold back from, so renovate.json5 mirrors no cap)
   cadence: "0 4 * * *"
   autoRollbackOnFailedHealth: true   # R-UPD-03
 observability:

catalog/pihole.yaml

@@ -5,7 +5,7 @@
 name: pihole
 kind: container
 source:
-  image: pihole/pihole
+  image: pihole/pihole:2026.10.0
 exposure: internal            # LAN-only admin UI (docs/13 row 6; R-DNS/R-NET)
 egress: internet              # normal WAN egress (docs/03; R-NET-05)
 storage:

catalog/plex.yaml

@@ -12,7 +12,7 @@
 name: plex
 kind: container
 source:
-  image: plexinc/pms-docker:latest
+  image: plexinc/pms-docker:1.43.4.10903-e5521bd8c
 # plexinc/pms-docker env. Rendered VERBATIM onto the app container by render.py (schema env list).
 env:
   # PLEX_UID/PLEX_GID: the image boots as root (s6 PID1), chowns /config to this uid/gid, then drops