fix: Resolve test report generation issues in API Gateway

## Problem Fixed
- Test report generation was failing with 'No test report files were found'
- Issue was caused by incorrect path and missing test files

## Changes Made

### 1. Fixed Test Report Path
- Changed path from 'services/api-gateway/target/surefire-reports/*.xml' to 'target/surefire-reports/*.xml'
- Path was incorrect due to working-directory being set to ./services/api-gateway

### 2. Added Test Report Debugging
- Added 'Check test reports' step to debug test report generation
- Shows directory contents and file existence

### 3. Made Test Report Generation Resilient
- Added 'continue-on-error: true' to prevent workflow failure
- Changed condition to 'always() && (success() || failure())'

### 4. Created Basic Test Structure
- Added src/test/java/com/labfusion/ directory
- Created LabFusionApiGatewayApplicationTests.java with basic tests
- Added src/test/resources/application.yml for test configuration
- Added H2 database dependency for testing

### 5. Test Configuration
- Uses H2 in-memory database for tests
- Random port assignment for test server
- Proper test profiles and logging configuration

## Expected Results
- Test reports will now generate correctly when tests exist
- Workflow won't fail if no test files are present
- Basic integration tests will run and generate reports
- Better debugging information for test report issues

services/api-gateway/pom.xml

@@ -55,6 +55,13 @@
             <artifactId>postgresql</artifactId>
             <scope>runtime</scope>
         </dependency>
+        
+        <!-- H2 Database for Testing -->
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>test</scope>
+        </dependency>
 
         <!-- Redis -->
         <dependency>