fix(deploy): sync systemd unit, preflight DB check, health retry

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/sac-deploy.sh

@@ -82,19 +82,44 @@ if [ -f "${APP_ROOT}/frontend/package.json" ]; then
 fi
 
 if [ -f "${APP_ROOT}/deploy/systemd/${SERVICE_NAME}.service" ]; then
- log "systemd unit (при необходимости скопируйте вручную в /etc/systemd/system/)"
+ SYSTEMD_DST="/etc/systemd/system/${SERVICE_NAME}.service"
+ if [ ! -f "${SYSTEMD_DST}" ] || ! cmp -s "${APP_ROOT}/deploy/systemd/${SERVICE_NAME}.service" "${SYSTEMD_DST}"; then
+  log "Обновление systemd unit → ${SYSTEMD_DST}"
+  cp "${APP_ROOT}/deploy/systemd/${SERVICE_NAME}.service" "${SYSTEMD_DST}"
+  systemctl daemon-reload
+ fi
 fi
 
+log "Проверка DATABASE_URL (как у uvicorn через SAC_CONFIG_FILE)"
+sudo -u "${APP_USER}" bash -c "
+  export SAC_CONFIG_FILE='${CONFIG_FILE}'
+  cd '${APP_ROOT}/backend'
+  '${VENV}/bin/python' -c \"
+from sqlalchemy import create_engine, text
+from app.config import get_settings
+engine = create_engine(get_settings().database_url, pool_pre_ping=True)
+with engine.connect() as conn:
+    conn.execute(text('SELECT 1'))
+print('db: OK')
+\"
+" || die "PostgreSQL: проверьте DATABASE_URL в ${CONFIG_FILE} и systemctl status postgresql"
+
 log "systemctl restart ${SERVICE_NAME}"
-systemctl daemon-reload 2>/dev/null || true
 systemctl restart "${SERVICE_NAME}"
 systemctl is-active --quiet "${SERVICE_NAME}" || die "${SERVICE_NAME} не active"
 
-sleep 1
-if curl -sf "http://127.0.0.1:8000/health" >/dev/null 2>&1; then
+HEALTH_OK=0
+for _ in 1 2 3 4 5 6; do
+ sleep 2
+ if curl -sf "http://127.0.0.1:8000/health" >/dev/null 2>&1; then
+  HEALTH_OK=1
+  break
+ fi
+done
+if [ "${HEALTH_OK}" -eq 1 ]; then
  log "health: OK (http://127.0.0.1:8000/health)"
 else
- log "WARN: локальный /health не ответил — проверьте journalctl -u ${SERVICE_NAME}"
+ die "${SERVICE_NAME} запущен, но /health не ответил — journalctl -u ${SERVICE_NAME} -n 80 --no-pager"
 fi
 
 log "Готово."