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/sheets/sheets.middleware.ts

@@ -1,11 +1,10 @@
 import { Request } from 'express';
 import multer, { FileFilterCallback } from 'multer';
 
-import { JSON_MIME } from '../../utils/parser.js';
 import { storage } from '../../utils/upload.js';
 
 const filterClientSecret = (_req: Request, file: Express.Multer.File, cb: FileFilterCallback) => {
-  if (file.mimetype.includes(JSON_MIME)) {
+  if (file.mimetype.includes('application/json')) {
     cb(null, true);
   } else {
     cb(null, false);