⚗️ refactor: Provider File Validation with Configurable Size Limits (#10405)

* chore: correct type for ServerRequest

* chore: improve ServerRequest typing across several modules

* feat: Add PDF configured limit validation

- Introduced comprehensive tests for PDF validation across multiple providers, ensuring correct behavior for file size limits and edge cases.
- Enhanced the `validatePdf` function to accept an optional configured file size limit, allowing for stricter validation based on user configurations.
- Updated related functions to utilize the new validation logic, ensuring consistent behavior across different providers.

* chore: Update Request type to ServerRequest in audio and video encoding modules

* refactor: move `getConfiguredFileSizeLimit` utility

* feat: Add video and audio validation with configurable size limits

- Introduced `validateVideo` and `validateAudio` functions to validate media files against provider-specific size limits.
- Enhanced validation logic to consider optional configured file size limits, allowing for more flexible file handling.
- Added comprehensive tests for video and audio validation across different providers, ensuring correct behavior for various scenarios.

* refactor: Update PDF and media validation to allow higher configured limits

- Modified validation logic to accept user-configured file size limits that exceed provider defaults, ensuring correct acceptance of files within the specified range.
- Updated tests to reflect changes in validation behavior, confirming that files are accepted when within the configured limits.
- Enhanced documentation in tests to clarify expected outcomes with the new validation rules.

* chore: Add @types/node-fetch dependency to package.json and package-lock.json

- Included the @types/node-fetch package to enhance type definitions for node-fetch usage.
- Updated package-lock.json to reflect the addition of the new dependency.

* fix: Rename FileConfigInput to TFileConfig

packages/api/src/files/text.ts

@@ -3,7 +3,7 @@ import FormData from 'form-data';
 import { createReadStream } from 'fs';
 import { logger } from '@librechat/data-schemas';
 import { FileSources } from 'librechat-data-provider';
-import type { Request as ServerRequest } from 'express';
+import type { ServerRequest } from '~/types';
 import { logAxiosError, readFileAsString } from '~/utils';
 import { generateShortLivedToken } from '~/crypto/jwt';
 
@@ -20,9 +20,7 @@ export async function parseText({
   file,
   file_id,
 }: {
-  req: Pick<ServerRequest, 'user'> & {
-    user?: { id: string };
-  };
+  req: ServerRequest;
   file: Express.Multer.File;
   file_id: string;
 }): Promise<{ text: string; bytes: number; source: string }> {