fix(deploy): конфиг в /opt/security-alert-center/config (sac:sac)

Убирает ошибку Permission denied при каталоге /etc root:root.

docs/deployment.md

@@ -14,7 +14,7 @@
 
 ```
 deploy/
-  env.native.example      → /etc/security-alert-center/sac-api.env
+  env.native.example      → /opt/security-alert-center/config/sac-api.env
   systemd/sac-api.service → /etc/systemd/system/
   nginx/sac.conf.example  → /etc/nginx/sites-available/sac
 ```
@@ -106,7 +106,7 @@ curl -sS https://sac.kalinamall.ru/health
 ```bash
 cd /opt/security-alert-center && sudo -u sac git pull
 sudo -u sac backend/.venv/bin/pip install -r backend/requirements.txt
-sudo -u sac bash -c 'set -a; source /etc/security-alert-center/sac-api.env; set +a; cd backend && .venv/bin/alembic upgrade head'
+sudo -u sac bash -c 'set -a; source /opt/security-alert-center/config/sac-api.env; set +a; cd backend && .venv/bin/alembic upgrade head'
 sudo systemctl restart sac-api
 ```