refactor(logging): replace console usage with logger

config/unified.config.ts

@@ -1,3 +1,5 @@
+import { logger } from '../services/logging';
+
 /**
  * Unified Application Configuration System
  *
@@ -754,10 +756,10 @@ function validateConfig(config: UnifiedConfig): void {
 
   // Log warnings and throw errors
   if (warnings.length > 0) {
-    console.warn('⚠️ Configuration warnings:', warnings);
+    logger.warn('Configuration warnings', 'CONFIG', warnings);
   }
   if (errors.length > 0) {
-    console.error('❌ Configuration errors:', errors);
+    logger.error('Configuration errors', 'CONFIG', errors);
     throw new Error(`Configuration validation failed: ${errors.join(', ')}`);
   }
 }
@@ -956,7 +958,7 @@ export function exportAsEnvVars(
  */
 export function logConfig(): void {
   if (unifiedConfig.features.debugMode) {
-    console.warn('🔧 Unified Configuration (Single Source of Truth):', {
+    logger.info('Unified Configuration (Single Source of Truth)', 'CONFIG', {
       environment: unifiedConfig.app.environment,
       app: unifiedConfig.app.name,
       version: unifiedConfig.app.version,