Upload .xlsx → preview rows → upload to Firestore (requisitions headers + req_lines lines). Safe batching (≤ 450 writes per commit).
| # | Status | Req No | Line No | Part No | FSC | NIIN | MFG Part No | Description | Qty | UOM | Purchase Order | PDD | Received QTY | Received Date | Budget Total | Selected Supplier | Awarded Supplier | Award Total | Req Status | Req Notes | Errors |
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