MT: Serial & Lot Tracking

MT: Serial & Lot Tracking combines per-unit serial numbers and lots with expiry dates in one tool. Assign directly on the order: scan with any phone via QR code (no login), use a USB scanner, type, or pick from a stock list. A serial can only be assigned once, strict product matching stops mistakes, releases are logged, and each assignment is written to the order as a metafield. Search any serial or lot to find its order; email alerts warn before a lot in stock expires. CSV export included.