fix(config): resolve circular import in unified config

- Replace direct logger import with dynamic import pattern
- Add withLogger utility to handle async logger initialization
- Prevent module loading issues during configuration bootstrap
- Maintain logging functionality while avoiding circular dependencies

config/unified.config.ts

@@ -1,4 +1,20 @@
-import { logger } from '../services/logging';
+type LoggerInstance = (typeof import('../services/logging'))['logger'];
+
+let loggerPromise: Promise<LoggerInstance | null> | null = null;
+
+function withLogger(callback: (logger: LoggerInstance) => void): void {
+  if (!loggerPromise) {
+    loggerPromise = import('../services/logging')
+      .then(module => module.logger)
+      .catch(() => null);
+  }
+
+  void loggerPromise.then(logger => {
+    if (logger) {
+      callback(logger);
+    }
+  });
+}
 
 /**
  * Unified Application Configuration System
@@ -756,10 +772,14 @@ function validateConfig(config: UnifiedConfig): void {
 
   // Log warnings and throw errors
   if (warnings.length > 0) {
-    logger.warn('Configuration warnings', 'CONFIG', warnings);
+    withLogger(logger =>
+      logger.warn('Configuration warnings', 'CONFIG', warnings)
+    );
   }
   if (errors.length > 0) {
-    logger.error('Configuration errors', 'CONFIG', errors);
+    withLogger(logger =>
+      logger.error('Configuration errors', 'CONFIG', errors)
+    );
     throw new Error(`Configuration validation failed: ${errors.join(', ')}`);
   }
 }
@@ -957,7 +977,11 @@ export function exportAsEnvVars(
  * Debug helper to log current configuration
  */
 export function logConfig(): void {
-  if (unifiedConfig.features.debugMode) {
+  if (!unifiedConfig.features.debugMode) {
+    return;
+  }
+
+  withLogger(logger =>
     logger.info('Unified Configuration (Single Source of Truth)', 'CONFIG', {
       environment: unifiedConfig.app.environment,
       app: unifiedConfig.app.name,
@@ -974,8 +998,8 @@ export function logConfig(): void {
       },
       features: unifiedConfig.features,
       configSource: '.env file overrides applied',
-    });
+    })
-  }
+  );
 }
 
 // Auto-log in development