Update AwsBedrockService medical analysis prompt for clarity

- Revised the medical analysis prompt in AwsBedrockService tests to enhance clarity and focus on lab reports.
- Ensured consistency in prompt messaging across test cases.

Author: adamrefaey

backend/src/document-processor/services/aws-bedrock.service.spec.ts

@@ -219,7 +219,7 @@ describe('AwsBedrockService', () => {
       // Verify the invokeBedrock was called with the correct prompt
       expect(service['invokeBedrock']).toHaveBeenCalled();
       const prompt = (service['invokeBedrock'] as any).mock.calls[0][0];
-      expect(prompt).toContain('Please analyze this medical document carefully');
+      expect(prompt).toContain('Analyze this medical document with focus on lab reports');
     });
 
     it('should correctly format the request for Claude models', async () => {
@@ -242,7 +242,7 @@ describe('AwsBedrockService', () => {
       // Verify the invokeBedrock was called with the correct prompt
       expect(service['invokeBedrock']).toHaveBeenCalled();
       const prompt = (service['invokeBedrock'] as any).mock.calls[0][0];
-      expect(prompt).toContain('Please analyze this medical document carefully');
+      expect(prompt).toContain('Analyze this medical document with focus on lab reports');
     });
 
     it('should throw an error for invalid input', async () => {