refactor: migrate custom fields to transactions

refactor: extract functions to api domain

refactor: strict custom field parsing

refactor: remove rundown cache utilities

refactor: directory restructure

apps/server/src/api-data/excel/excel.middleware.ts

@@ -1,9 +1,10 @@
 import type { Request } from 'express';
 import multer, { type FileFilterCallback } from 'multer';
 
-import { EXCEL_MIME } from '../../utils/parser.js';
 import { storage } from '../../utils/upload.js';
 
+export const EXCEL_MIME = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
+
 const filterExcel = (_req: Request, file: Express.Multer.File, cb: FileFilterCallback) => {
   if (file.mimetype.includes(EXCEL_MIME)) {
     cb(null, true);