fix: resolve trailing whitespace and end-of-file formatting issues

- Fixed trailing whitespace in CHANGELOG.md, README.md, phase2b_completion_summary.md
- Applied end-of-file fixes to ensure proper newlines
- All pre-commit hooks now passing (black, isort, flake8, trailing-whitespace, end-of-file-fixer, check-yaml)
- Ready for CI/CD pipeline success

CHANGELOG.md

@@ -25,7 +25,7 @@ Each entry includes:
 
 - **Phase 2B Final Status**: ✅ **FULLY COMPLETED AND DOCUMENTED**
   - ✅ Issue #2/#16 - Enhanced Ingestion Pipeline (Entry #019) - **MERGED TO MAIN**
-  - ✅ Issue #3/#15 - Search API Endpoint (Entry #020) - **MERGED TO MAIN**  
+  - ✅ Issue #3/#15 - Search API Endpoint (Entry #020) - **MERGED TO MAIN**
   - ✅ Issue #4/#17 - End-to-End Testing - **COMPLETED**
   - ✅ Issue #5/#19 - Documentation - **COMPLETED**
 
@@ -127,7 +127,7 @@ Each entry includes:
   - ✅ Proper error handling with meaningful error messages
   - ✅ RESTful API design following standard conventions
   - ✅ Complete test coverage for all validation scenarios
-- **CI/CD Resolution**: 
+- **CI/CD Resolution**:
   - ✅ Black formatter compatibility issues resolved through code refactoring
   - ✅ All formatting checks passing (black, isort, flake8)
   - ✅ Full CI/CD pipeline success

README.md

@@ -202,7 +202,7 @@ pytest
 ```bash
 # Run specific test suites
 pytest tests/test_embedding/              # Embedding service tests
-pytest tests/test_vector_store/           # Vector database tests  
+pytest tests/test_vector_store/           # Vector database tests
 pytest tests/test_search/                 # Search functionality tests
 pytest tests/test_ingestion/              # Document processing tests
 pytest tests/test_integration/            # End-to-end pipeline tests

phase2b_completion_summary.md

@@ -1,8 +1,8 @@
 # Phase 2B Completion Summary
 
-**Project**: MSSE AI Engineering - RAG Application  
-**Phase**: 2B - Semantic Search Implementation  
-**Completion Date**: October 17, 2025  
+**Project**: MSSE AI Engineering - RAG Application
+**Phase**: 2B - Semantic Search Implementation
+**Completion Date**: October 17, 2025
 **Status**: ✅ **COMPLETED**
 
 ## Overview
@@ -13,7 +13,7 @@ Phase 2B successfully implements a complete semantic search pipeline for corpora
 
 ### 1. Enhanced Ingestion Pipeline ✅
 - **Implementation**: Extended existing document processing to include embedding generation
-- **Features**: 
+- **Features**:
   - Batch processing (32 chunks per batch) for memory efficiency
   - Configurable embedding storage (on/off via API parameter)
   - Enhanced API responses with detailed statistics
@@ -31,7 +31,7 @@ Phase 2B successfully implements a complete semantic search pipeline for corpora
 - **Files**: `app.py` (updated), `tests/test_app.py` (enhanced)
 - **Tests**: 8 dedicated search endpoint tests plus integration coverage
 
-### 3. End-to-End Testing ✅ 
+### 3. End-to-End Testing ✅
 - **Implementation**: Comprehensive test suite validating complete pipeline
 - **Features**:
   - Full pipeline testing (ingest → embed → search)
@@ -236,4 +236,4 @@ Phase 2B delivers a production-ready semantic search system that successfully re
 - ✅ Complete documentation and examples
 - ✅ CI/CD pipeline integration maintained
 
-The system is ready for Phase 3 RAG implementation and production deployment.
+The system is ready for Phase 3 RAG implementation and production deployment.