fix: Resolve core package test syntax errors and missing exports

Fixed TypeScript test compilation issues:

1. **Added missing enum exports:**
   - Exported AnalysisTier and ModelSelectionStrategy from model-selection index
   - Added explicit exports in main core index for CI compatibility

2. **Fixed test imports:**
   - Updated test file to import from main core package instead of subpaths
   - Consolidated imports for better maintainability

This resolves the Babel parser syntax errors in CI test runs.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: alpsla

packages/core/src/index.ts

@@ -80,6 +80,9 @@ export * from './services/model-selection/RepositoryModelSelectionService';
 export * from './services/model-selection/RepositoryCalibrationService';
 export * from './services/model-selection/ModelConfigStore';
 
+// Explicitly export model selection enums for better CI compatibility
+export { AnalysisTier, ModelSelectionStrategy } from './services/model-selection/RepositoryModelSelectionService';
+
 // Services
 // export * from './services/pr-review-service'; // Temporarily disabled due to database dependency
 

packages/core/src/services/model-selection/index.ts

@@ -7,6 +7,8 @@
  */
 
 export * from './RepositoryModelSelectionService';
+// Export specific enums for better compatibility
+export { AnalysisTier, ModelSelectionStrategy } from './RepositoryModelSelectionService';
 export * from './RepositoryCalibrationService';
 export * from './ModelConfigStore';
 

packages/core/test/services/RepositoryModelSelectionService.test.ts

@@ -10,9 +10,9 @@ import sinon from 'sinon';
 import { 
   AnalysisTier, 
   ModelSelectionStrategy,
-  RepositoryModelSelectionService 
-} from '../../src/services/model-selection';
-import { RepositoryContext } from '../../src/types/repository';
+  RepositoryModelSelectionService,
+  RepositoryContext
+} from '../../src/index';
 
 describe('RepositoryModelSelectionService', () => {
   let service: RepositoryModelSelectionService;