Blame for .env.example

# Local dev only. On Hugging Face put these in Settings -> Secrets. NEVER commit .env
BOT_TOKEN=123456:ABC...
DATABASE_URL=postgresql://USER:PASSWORD@HOST:6543/postgres
GATE_CHANNEL=@DBUCentral
ADMIN_IDS=111111,222222
DEFAULT_LANG=am
LOG_LEVEL=INFO

# Watermark stamped on every uploaded PDF (defaults shown)
WATERMARK_ENABLED=true
WATERMARK_TEXT=DBU Freshman Central
# WATERMARK_URL=https://t.me/DBUCentral   (empty = derived from GATE_CHANNEL)
WATERMARK_DIAGONAL=true