fix: Remove duplicate NATS store_dir and jetstream flags from compose

Config file already sets jetstream and store_dir. Duplicate CLI flags
cause NATS to exit with error.

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

docker/docker-compose.yml

@@ -22,8 +22,6 @@ services:
     image: nats:latest
     container_name: corrosion-nats
     command:
-      - "--jetstream"
-      - "--store_dir=/data"
       - "--config=/etc/nats/nats.conf"
     volumes:
       - nats_data:/data