perf: Parse teachers only once, not for every day

scrape/parse.js

@@ -6,6 +6,7 @@ import parseTeachers from "./utils/parseTeachers.js"
 export default async function parseThisShit(downloadedFilePath) {
   const workbook = new ExcelJS.Workbook();
   await workbook.xlsx.readFile(downloadedFilePath);
+  const teacherMap = await parseTeachers();
 
   const sheetNames = workbook.worksheets.map((sheet) => sheet.name);
 
@@ -132,7 +133,6 @@ export default async function parseThisShit(downloadedFilePath) {
     });
 
     if (absenceKey) {
-      const teacherMap = await parseTeachers();
       const absenceCell = currentSheet.getCell(absenceKey);
       const rowNumber = absenceCell.row;
       const allAbsenceKeys = [];