Update PostgreSQL 17 → 18 in package lists and docs

Reflects the PG 18 upgrade already applied in the main repo.

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

CLAWDIE-ISO.md

@@ -334,7 +334,7 @@ Derived from `setup/environment.ts` host baseline + desktop-installer + DE packa
 
 **Clawdie host baseline:**
 `node24`, `npm`, `bsddialog`, `bastille`, `git`, `tmux`, `python311`, `py311-pip`,
-`py311-aider_chat`, `uv`, `ripgrep`, `fd-find`, `rsync`, `postgresql17-client`,
+`py311-aider_chat`, `uv`, `ripgrep`, `fd-find`, `rsync`, `postgresql18-client`,
 `py311-pillow`, `dejavu`
 
 **Aider venv pin (post-install):**

packages/pkg-list-host.txt

@@ -26,7 +26,7 @@ rsync
 tailscale
 
 # DB client (host talks to db jail)
-postgresql17-client
+postgresql18-client
 
 # Media / fonts
 py311-pillow

packages/pkg-list-jails.txt

@@ -12,11 +12,11 @@ curl
 nginx
 node24
 npm
-postgresql17-client
+postgresql18-client
 
 # db-jail
-postgresql17-server
-postgresql17-contrib
+postgresql18-server
+postgresql18-contrib
 pgvector
 
 # worker-jail