updated the changelog for new multimodal page level classification approach

Author: mmiakashs

CHANGELOG.md

@@ -5,6 +5,25 @@ SPDX-License-Identifier: MIT-0
 
 ## [Unreleased]
 
+### Added
+
+- **BIO-like Sequence Segmentation for Multimodal Classification**
+  - Enhanced multimodal page-level classification with document boundary detection using BIO (Begin-Inside-Outside) tagging
+  - Each page receives both document type and boundary indicator ("start"/"continue") for automatic multi-document packet segmentation
+  - Eliminates need for manual document splitting in complex packets containing multiple documents of same type
+
+### Changed
+
+- **Consolidated Classification Methods**
+  - Merged `multimodalPageBoundaryClassification` into enhanced `multimodalPageLevelClassification` 
+  - Removed `MULTIMODAL_PAGE_BOUNDARY` constant and simplified configuration logic
+  - Maintains backward compatibility with existing configurations
+
+### Documentation
+
+- **Updated Classification Documentation**
+  - Enhanced service docstrings and README files with sequence segmentation examples
+  - Added comprehensive classification guide with method comparisons and best practices
 
 ### Added