Add DocumentProcessorController and update README for medical document processing

- Introduced DocumentProcessorController in backend/src/controllers/document-processor.controller.ts to handle document upload and processing.
- Implemented endpoints for uploading documents and retrieving a test form, enhancing the document processing functionality.
- Updated backend/README.md to include detailed information about the new endpoints and usage instructions for the medical document processor.

Author: adamrefaey

backend/README.md

@@ -88,3 +88,77 @@ This script sets a resource policy that:
 2. Denies any non-HTTPS requests to your API
 
 If you need more complex permissions, you can modify the policy object in the script.
+
+# Medical Document Processor Test Controller
+
+This module provides a test controller for uploading and processing medical documents using the DocumentProcessorService.
+
+## Available Endpoints
+
+### Test Form
+```
+GET /api/document-processor/test-form
+```
+Provides a simple HTML form for testing the document processor functionality:
+- Upload PDF or image files (JPEG, PNG, TIFF)
+- See extracted text and medical analysis results
+
+### Upload Document
+```
+POST /api/document-processor/upload
+```
+API endpoint for uploading and processing medical documents:
+- Accepts PDF or image files (JPEG, PNG, TIFF)
+- Returns extracted text and medical analysis
+
+**Request parameters:**
+- `file` - The file to process (multipart/form-data)
+- `userId` - Optional user ID for tracking/analytics (defaults to "test-user-id")
+
+**Response:**
+```json
+{
+  "extractedText": {
+    "rawText": "...",
+    "lines": [...],
+    "tables": [...],
+    "keyValuePairs": [...]
+  },
+  "analysis": {
+    "keyMedicalTerms": [...],
+    "labValues": [...],
+    "diagnoses": [...],
+    "metadata": {
+      "isMedicalReport": true,
+      "confidence": 0.95,
+      "missingInformation": []
+    }
+  },
+  "processingMetadata": {
+    "processingTimeMs": 2500,
+    "fileType": "application/pdf",
+    "fileSize": 245000
+  }
+}
+```
+
+### Test Status
+```
+GET /api/document-processor/test
+```
+Simple endpoint to verify the controller is working properly.
+
+## Testing
+
+To test the document processing functionality:
+
+1. Ensure your backend server is running
+2. Navigate to `http://localhost:3000/api/document-processor/test-form` in your browser
+3. Upload a medical document (PDF, JPEG, PNG, or TIFF)
+4. View the results of text extraction and medical analysis
+
+## Notes
+
+- Maximum file size: 10 MB
+- Supported file types: PDF, JPEG, PNG, TIFF
+- For testing purposes, authentication is bypassed for these endpoints