👁️ feat: Azure Mistral OCR Strategy (#7888)

* 👁️ feat: Add Azure Mistral OCR strategy and endpoint integration

This commit introduces a new OCR strategy named 'azure_mistral_ocr', allowing the use of a Mistral OCR endpoint deployed on Azure. The configuration, schemas, and file upload strategies have been updated to support this integration, enabling seamless OCR processing via Azure-hosted Mistral services.

* 🗑️ chore: Clean up .gitignore by removing commented-out uncommon directory name

* chore: remove unused vars

* refactor: Move createAxiosInstance to packages/api/utils and update imports

- Removed the createAxiosInstance function from the config module and relocated it to a new utils module for better organization.
- Updated import paths in relevant files to reflect the new location of createAxiosInstance.
- Added tests for createAxiosInstance to ensure proper functionality and proxy configuration handling.

* chore: move axios helpers to packages/api

- Added logAxiosError function to @librechat/api for centralized error logging.
- Updated imports across various files to use the new logAxiosError function.
- Removed the old axios.js utility file as it is no longer needed.

* chore: Update Jest moduleNameMapper for improved path resolution

- Added a new mapping for '~/' to resolve module paths in Jest configuration, enhancing import handling for the project.

* feat: Implement Mistral OCR API integration in TS

* chore: Update MistralOCR tests based on new imports

* fix: Enhance MistralOCR configuration handling and tests

- Introduced helper functions for resolving configuration values from environment variables or hardcoded settings.
- Updated the uploadMistralOCR and uploadAzureMistralOCR functions to utilize the new configuration resolution logic.
- Improved test cases to ensure correct behavior when mixing environment variables and hardcoded values.
- Mocked file upload and signed URL responses in tests to validate functionality without external dependencies.

* feat: Enhance MistralOCR functionality with improved configuration and error handling

- Introduced helper functions for loading authentication configuration and resolving values from environment variables.
- Updated uploadMistralOCR and uploadAzureMistralOCR functions to utilize the new configuration logic.
- Added utility functions for processing OCR results and creating error messages.
- Improved document type determination and result aggregation for better OCR processing.

* refactor: Reorganize OCR type imports in Mistral CRUD file

- Moved OCRResult, OCRResultPage, and OCRImage imports to a more logical grouping for better readability and maintainability.

* feat: Add file exports to API and create files index

* chore: Update OCR types for enhanced structure and clarity

- Redesigned OCRImage interface to include mandatory fields and improved naming conventions.
- Added PageDimensions interface for better representation of page metrics.
- Updated OCRResultPage to include dimensions and mandatory images array.
- Refined OCRResult to include document annotation and usage information.

* refactor: use TS counterpart of uploadOCR methods

* ci: Update MistralOCR tests to reflect new OCR result structure

* chore: Bump version of @librechat/api to 1.2.3 in package.json and package-lock.json

* chore: Update CONFIG_VERSION to 1.2.8

* chore: remove unused sendEvent function from config module (now imported from '@librechat/api')

* chore: remove MistralOCR service files and tests (now in '@librechat/api')

* ci: update logger import in ModelService tests to use @librechat/data-schemas

---------

Co-authored-by: arthurolivierfortin <arthurolivier.fortin@gmail.com>

api/config/index.js

@@ -1,4 +1,3 @@
-const axios = require('axios');
 const { EventSource } = require('eventsource');
 const { Time } = require('librechat-data-provider');
 const { MCPManager, FlowStateManager } = require('@librechat/api');
@@ -37,60 +36,8 @@ function getFlowStateManager(flowsCache) {
   return flowManager;
 }
 
-/**
- * Sends message data in Server Sent Events format.
- * @param {ServerResponse} res - The server response.
- * @param {{ data: string | Record<string, unknown>, event?: string }} event - The message event.
- * @param {string} event.event - The type of event.
- * @param {string} event.data - The message to be sent.
- */
-const sendEvent = (res, event) => {
-  if (typeof event.data === 'string' && event.data.length === 0) {
-    return;
-  }
-  res.write(`event: message\ndata: ${JSON.stringify(event)}\n\n`);
-};
-
-/**
- * Creates and configures an Axios instance with optional proxy settings.
- *
- * @typedef {import('axios').AxiosInstance} AxiosInstance
- * @typedef {import('axios').AxiosProxyConfig} AxiosProxyConfig
- *
- * @returns {AxiosInstance} A configured Axios instance
- * @throws {Error} If there's an issue creating the Axios instance or parsing the proxy URL
- */
-function createAxiosInstance() {
-  const instance = axios.create();
-
-  if (process.env.proxy) {
-    try {
-      const url = new URL(process.env.proxy);
-
-      /** @type {AxiosProxyConfig} */
-      const proxyConfig = {
-        host: url.hostname.replace(/^\[|\]$/g, ''),
-        protocol: url.protocol.replace(':', ''),
-      };
-
-      if (url.port) {
-        proxyConfig.port = parseInt(url.port, 10);
-      }
-
-      instance.defaults.proxy = proxyConfig;
-    } catch (error) {
-      console.error('Error parsing proxy URL:', error);
-      throw new Error(`Invalid proxy URL: ${process.env.proxy}`);
-    }
-  }
-
-  return instance;
-}
-
 module.exports = {
   logger,
-  sendEvent,
   getMCPManager,
-  createAxiosInstance,
   getFlowStateManager,
 };