update pricing i guess

app/routes/inventory_management_routes.py

@@ -485,4 +485,20 @@ async def confirm_listings(
     except ValueError as e:
         raise HTTPException(status_code=400, detail=str(e))
     except Exception as e:
-        raise HTTPException(status_code=500, detail=str(e))
+        raise HTTPException(status_code=500, detail=str(e))
+    
+@router.get("/tcgplayer/update-file")
+async def get_tcgplayer_update_file(
+    db: Session = Depends(get_db)
+):
+    inventory_service = service_manager.get_service("inventory")
+    marketplace_listing_service = service_manager.get_service("marketplace_listing")
+    marketplace = await inventory_service.create_marketplace(db, "Tcgplayer")
+    csv_string = await marketplace_listing_service.create_tcgplayer_update_file(db, marketplace)
+    return StreamingResponse(
+        iter([csv_string]),
+        media_type="text/csv",
+        headers={
+            "Content-Disposition": f"attachment; filename=tcgplayer_update_file_{datetime.now().strftime('%Y-%m-%d_%H-%M-%S')}.csv"
+        }
+    )