Update CHANGELOG.md with refined document compression feature descriptions

Author: Bob Strahan

CHANGELOG.md

@@ -7,16 +7,15 @@ SPDX-License-Identifier: MIT-0
 
 ### Added
 - **Document Compression for Large Documents**
-  - Added automatic compression support to handle large documents that exceed Step Functions payload limits (256KB)
+  - Added automatic compression support to handle large documents and avoid exceeding Step Functions payload limits (256KB)
   - **Key Features**:
-    - Automatic compression when documents exceed configurable size thresholds (default 200KB)
+    - Automatic compression (default trigger threshold of 0KB enables compression by default)
     - Transparent handling of both compressed and uncompressed documents in Lambda functions
-    - Section ID preservation in compressed payloads for Step Functions Map operations
     - Temporary S3 storage for compressed document state with automatic cleanup via lifecycle policies
   - **New Utility Methods**:
     - `Document.handle_input_document()`: Automatically detects and decompresses document input from Lambda events
     - `Document.prepare_output()`: Automatically compresses large documents for Lambda responses
-    - `Document.compress()` and `Document.decompress()`: Manual compression/decompression methods
+    - `Document.compress()` and `Document.decompress()`: Compression/decompression methods
   - **Lambda Function Integration**: All Pattern-2 and Pattern-3 Lambda functions updated to use compression utilities
   - **Resolves Step Functions Errors**: Eliminates "result with a size exceeding the maximum number of bytes service limit" errors for large multi-page documents
 - **Multi-Backend OCR Support**