normalize all stacks to conventions

- VOL_PATH always defaults to /data; vscode/opencode VOL_PROJECTS nests it
- TZ defaults to America/Vancouver (was UTC in etherpad, ntfy, redis)
- compose section order fixed (volumes before environment, command after networks)
- all default secrets are the literal ChangeThisPassword (grep-friendly,
  users must change them); removed a real key from ollama sample.env
- sample.env synced with compose: missing vars added with defaults, dead vars removed
- invoiceninja_dev/openarchiver_dev: app services had no environment block,
  wired all sample.env vars through so the stacks actually work
- opencode: sample.env OLLAMA_HOST renamed to OLLAMA_HOST_URL to match compose
- TZ values unquoted consistently

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

qbittorrent/compose.yaml

@@ -3,13 +3,13 @@ services:
     image: ${QBT_IMAGE:-trigus42/qbittorrentvpn:latest}
     restart: ${QBT_RESTART:-unless-stopped}
     volumes:
-      - ${VOL_PATH}/qbit/config:/config
-      - ${VOL_PATH}/qbit/downloads:/downloads
-      - ${VOL_PATH}/qbit/incomplete:/incomplete
+      - ${VOL_PATH:-/data}/qbit/config:/config
+      - ${VOL_PATH:-/data}/qbit/downloads:/downloads
+      - ${VOL_PATH:-/data}/qbit/incomplete:/incomplete
       - /dev/net/tun:/dev/net/tun
     environment:
       - VPN_TYPE=wireguard
-      - WEBUI_PASSWORD=${QBT_PASS:-ChangeMePass}
+      - WEBUI_PASSWORD=${QBT_PASS:-ChangeThisPassword}
     ports:
       - ${QBT_PORT:-8080}:8080
     cap_add: