260327-窗口迭代逻辑修复，不是每天只跑一条

run_daily_incremental.sh

@@ -25,6 +25,27 @@ if [[ ! -x "$PY_BIN" ]]; then
   exit 1
 fi
 
+# Dependency preflight (avoid silent runtime failures after cron upgrades)
+if ! "$PY_BIN" - <<'PY' >> "$LOG_DIR/daily_job.log" 2>&1
+import importlib
+missing = []
+for name in ("telethon", "pymysql", "cryptography"):
+    try:
+        importlib.import_module(name)
+    except Exception:
+        missing.append(name)
+
+if missing:
+    print(f"missing python packages: {', '.join(missing)}")
+    raise SystemExit(1)
+
+print("python dependency preflight passed")
+PY
+then
+  echo "[$(date '+%Y-%m-%d %H:%M:%S')] dependency preflight failed, exit" >> "$LOG_DIR/daily_job.log"
+  exit 1
+fi
+
 # Auto-advance time window to a rolling daily range.
 "$PY_BIN" - <<'PY'
 import json