Add option to disable Telegram notifications for wolf crons and vulture

Problem

Wolf cron notifications (🐺) and vulture session-cleanup notifications (🦅) are sent to Telegram on every cron run and every session reap. There's no way to disable or mute them without editing platform code.

For labs running 10+ crons (keepalive every 10 min, daily scrapes, weekly builds, nudges, recaps), this floods the Telegram chat with system noise.

Proposed solution

Add a per-cron "silent": true option in wolf.json and a global env var DISABLE_WOLF_NOTIFY=true to suppress Telegram notifications.

Per-cron (wolf.json):

{
  "name": "apps-keepalive",
  "schedule": "*/10 * * * *",
  "action": "script",
  "command": "bash /workspace/wolts/LabRat/wolt/tools/apps-keepalive.sh",
  "silent": true
}

Global (env var):

DISABLE_WOLF_NOTIFY=true    # mutes all wolf cron notifications
DISABLE_VULTURE_NOTIFY=true # mutes all vulture cleanup notifications

Where the code lives

• creatures/wolf.py — send_wolf_notify() at line ~233, called at lines 305, 347, 393
• creatures/vulture.py — _send_notify() at line ~49
• server/notify.py — send_notification() is the shared endpoint

Workaround

None clean — notifications are hardcoded. Would need to either unset TELEGRAM_ALLOWED_USERS (breaks all notifications) or edit platform code directly.

Start in creatures/wolf.py at send_wolf_notify() and its calls around lines 305, 347, and 393, then inspect creatures/vulture.py at _send_notify() and the shared server/notify.py endpoint. Trace how wolf.json options and environment variables are read. Done means per-cron silent and the two global notification variables suppress the specified Telegram messages without disabling unrelated notifications.