Add script to schedule weekly Monday midnight run

setup_weekly_cron.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+PROJECT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PYTHON_BIN="$(command -v python3 || true)"
+
+if [[ -z "${PYTHON_BIN}" ]]; then
+  echo "Error: python3 not found in PATH."
+  exit 1
+fi
+
+LOG_FILE="${PROJECT_DIR}/weekly_main.log"
+CRON_CMD="cd ${PROJECT_DIR} && ${PYTHON_BIN} ${PROJECT_DIR}/main.py >> ${LOG_FILE} 2>&1"
+CRON_JOB="0 0 * * 1 ${CRON_CMD}"
+
+CURRENT_CRON="$(crontab -l 2>/dev/null || true)"
+
+if grep -Fq "${CRON_CMD}" <<< "${CURRENT_CRON}"; then
+  echo "Cron job already exists:"
+  echo "${CRON_JOB}"
+  exit 0
+fi
+
+{
+  [[ -n "${CURRENT_CRON}" ]] && echo "${CURRENT_CRON}"
+  echo "${CRON_JOB}"
+} | crontab -
+
+echo "Cron job installed successfully:"
+echo "${CRON_JOB}"
+echo "Log file: ${LOG_FILE}"