re-adding END_ROW to prevent crash (?!)

src/core/excelreader.cpp

@@ -23,13 +23,17 @@ std::size_t ExcelReader::readSellersFromFile(const fs::path& filePath, Marketpla
     auto ws = wb.sheet_by_index(0);
 
     const int START_ROW = 5;
+    const int END_ROW = 503;
 
     int rowCount{};
     for (const auto& row : ws.rows(false)) {
         if (rowCount < START_ROW) {
             ++rowCount;
             continue;
+        } else if (rowCount > END_ROW) {
+            break;
         }
+
         if (row[2].value<std::string>().empty() && row[3].value<std::string>().empty()) {
             ++rowCount;
             continue;