👁️ 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/server/services/Files/strategies.js

@@ -1,4 +1,5 @@
 const { FileSources } = require('librechat-data-provider');
+const { uploadMistralOCR, uploadAzureMistralOCR } = require('@librechat/api');
 const {
   getFirebaseURL,
   prepareImageURL,
@@ -46,7 +47,6 @@ const {
 const { uploadOpenAIFile, deleteOpenAIFile, getOpenAIFileStream } = require('./OpenAI');
 const { getCodeOutputDownloadStream, uploadCodeEnvFile } = require('./Code');
 const { uploadVectors, deleteVectors } = require('./VectorDB');
-const { uploadMistralOCR } = require('./MistralOCR');
 
 /**
  * Firebase Storage Strategy Functions
@@ -202,6 +202,26 @@ const mistralOCRStrategy = () => ({
   handleFileUpload: uploadMistralOCR,
 });
 
+const azureMistralOCRStrategy = () => ({
+  /** @type {typeof saveFileFromURL | null} */
+  saveURL: null,
+  /** @type {typeof getLocalFileURL | null} */
+  getFileURL: null,
+  /** @type {typeof saveLocalBuffer | null} */
+  saveBuffer: null,
+  /** @type {typeof processLocalAvatar | null} */
+  processAvatar: null,
+  /** @type {typeof uploadLocalImage | null} */
+  handleImageUpload: null,
+  /** @type {typeof prepareImagesLocal | null} */
+  prepareImagePayload: null,
+  /** @type {typeof deleteLocalFile | null} */
+  deleteFile: null,
+  /** @type {typeof getLocalFileStream | null} */
+  getDownloadStream: null,
+  handleFileUpload: uploadAzureMistralOCR,
+});
+
 // Strategy Selector
 const getStrategyFunctions = (fileSource) => {
   if (fileSource === FileSources.firebase) {
@@ -222,6 +242,8 @@ const getStrategyFunctions = (fileSource) => {
     return codeOutputStrategy();
   } else if (fileSource === FileSources.mistral_ocr) {
     return mistralOCRStrategy();
+  } else if (fileSource === FileSources.azure_mistral_ocr) {
+    return azureMistralOCRStrategy();
   } else {
     throw new Error('Invalid file source');
   }