feat(upload): increase document upload size limits to 50MB across the application

apps/edr-freight-api/src/common/document-upload.options.ts

@@ -0,0 +1,30 @@
+import { MulterOptions } from "@nestjs/platform-express/multer/interfaces/multer-options.interface";
+
+/**
+ * Ceiling for a single uploaded document, in bytes.
+ *
+ * Mirrors the 50MB `max_size_mb` the file-upload settings hand the portal, so
+ * the client-side gate and the server-side cap agree. Raising this alone is not
+ * enough to accept a 50MB upload: the reverse proxy in front of the API applies
+ * its own `client_max_body_size`, and nginx's 1MB default rejects the request
+ * with a 413 before it ever reaches Nest (see docs/uploads.md).
+ */
+export const DOCUMENT_UPLOAD_MAX_BYTES = 50 * 1024 * 1024;
+
+/** Upper bound on parts in one multipart document post. */
+export const DOCUMENT_UPLOAD_MAX_FILES = 20;
+
+/**
+ * Multer caps for the document upload routes.
+ *
+ * Without an explicit `fileSize`, multer's default is unlimited and every byte
+ * is buffered in memory, so an oversized post is absorbed in full before
+ * anything can reject it. With the limit set, multer stops reading the socket
+ * at the ceiling instead.
+ */
+export const documentUploadMulterOptions: MulterOptions = {
+  limits: {
+    fileSize: DOCUMENT_UPLOAD_MAX_BYTES,
+    files: DOCUMENT_UPLOAD_MAX_FILES,
+  },
+};