fix(infra): force-recreate n8n container to apply env changes

n8n container was reusing old config without
N8N_BLOCK_ENV_ACCESS_IN_NODE=false. Also revert hardcoded
Sheets ID back to $env reference.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ImTotem

infra/scripts/init_n8n.sh

@@ -109,7 +109,7 @@ json.dump(cred, sys.stdout)
 echo "=== n8n Init ==="
 
 echo "1. Starting n8n..."
-$COMPOSE up -d n8n
+$COMPOSE up -d --force-recreate n8n
 
 echo "2. Waiting for n8n..."
 if ! wait_n8n; then