fix(B27): gate warn notify on real Telegram delivery (V66a) + scan config.env bind

VOTE ULANG SEGERA never reached community channel though dashboard badge showed:
- scan service lacked NFS config.env bind -> empty TELEGRAM_* -> send_text silent no-op
- _notify_warn still record_notify'd -> fake dedup rows blocked future sends

send_text/notify_warn now return delivery bool; record_notify only on True.
scan service mounts config.env:/app/.env:ro.

docker-compose.yml

@@ -86,6 +86,8 @@ services:
       TZ: ${TZ:-Asia/Jakarta}
       SCAN_HOURS: ${SCAN_HOURS:-0,8,16}
       SCAN_RUN_ON_START: ${SCAN_RUN_ON_START:-1}
+    volumes:
+      - /mnt/nfs/server5.saltis.id/data/databisnisid/app/config.env:/app/.env:ro
     networks:
       - appnet
     deploy: