Revert "update merge_demux_stats.py"

This reverts commit 8f0c93c.

Author: YanyanLiuBio

bin/merge_demux_stats.py

@@ -407,13 +407,14 @@ def main():
 
     # ── 4. NanoStat per well — filter to this pool only ──────────────────────
     pool_nanostat = [
-    f for f in args.nanostat
-    if (
-        Path(f).stem.replace("_nanostat", "").strip() in sample_to_well
-        or Path(f).stem.replace("_nanostat", "").strip().split(".")[-1] in sample_to_well
-        or Path(f).stem.replace("_nanostat", "").strip() == f"{pool_id}.{extract_well(Path(f).stem)}"
-    )
+        f for f in args.nanostat
+        if Path(f).name.startswith(pool_id + ".")
+        or Path(f).name.startswith(pool_id + "_")
     ]
+    if not pool_nanostat:
+        print(f"[WARN] No NanoStat files matched pool {pool_id} — using all files",
+              file=sys.stderr)
+        pool_nanostat = args.nanostat
 
     print(f"[debug] NanoStat files for pool {pool_id}: "
           f"{[Path(f).name for f in pool_nanostat]}", file=sys.stderr)