Refactor production and stock tests to remove UOM dependency

- Updated production.spec.ts, stock-adjustments.spec.ts, and stock-transfers.spec.ts to eliminate UOM references in API seeder and test cases.
- Adjusted ApiSeeder methods to remove UOM parameters from stock receiving and production template creation.
- Revised documentation to reflect changes in UOM handling, emphasizing that stock is counted in base UOM only.
- Introduced new enums for MeasureUnit and StageQtyUnit to clarify content size and stage input quantities.
- Implemented ItemContent service to validate and normalize content sizes.
- Updated smoke tests to validate production stage inputs expressed in content units, ensuring correct consumption calculations.
- Modified frontend UOM label handling to reflect the removal of per-line UOMs in document lines.

Backend/smoke/m3_runs.py

@@ -147,7 +147,7 @@ def main():
              "estimatedMinutes": s["estimatedMinutes"], "posX": s["posX"], "posY": s["posY"],
              "fieldDefs": s["fieldDefs"],
              "inputs": [{"source": i["source"], "itemId": i.get("itemId"),
-                         "fromOutputKey": i.get("fromOutputKey"), "uomId": i["uomId"],
+                         "fromOutputKey": i.get("fromOutputKey"), "qtyUnit": i["qtyUnit"],
                          "qtyPerBatch": i["qtyPerBatch"]} for i in s["inputs"]],
              "outputs": [{"key": o["key"], "itemId": o.get("itemId"), "name": o["name"],
                           "uomId": o["uomId"], "qtyPerBatch": o["qtyPerBatch"]} for o in s["outputs"]]}