docs: update CHANGELOG.md for v7.3.0

CHANGELOG.md

@@ -4,13 +4,14 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
-## [7.3.0] - 2025-12-15
+## [7.3.0] - 2025-12-16
 
 ## Features
 
 - **Table-based search output**: Unified timeline formatting with cleaner, more organized presentation of search results grouped by date and file
 - **Simplified API**: Removed unused format parameter from MCP search tools for cleaner interface
 - **Shared formatting utilities**: Extracted common timeline formatting logic into reusable module
+- **Batch observations endpoint**: Added `/api/observations/batch` endpoint for efficient retrieval of multiple observations by ID array
 
 ## Changes
 
@@ -23,6 +24,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fixed skillPath variable scoping bug in instructions endpoint
 - Extracted magic numbers to named constants for better code maintainability
 
+**Full Changelog**: https://github.com/thedotmack/claude-mem/compare/v7.2.4...v7.3.0
+
 ## [7.2.4] - 2025-12-15
 
 ## What's Changed
@@ -2442,12 +2445,12 @@ None (patch version)
 
 ## [4.3.0] - 2025-10-25
 
-## What's Changed
-* feat: Enhanced context hook with session observations and cross-platform improvements by @thedotmack in https://github.com/thedotmack/claude-mem/pull/25
-
-## New Contributors
-* @thedotmack made their first contribution in https://github.com/thedotmack/claude-mem/pull/25
-
+## What's Changed
+* feat: Enhanced context hook with session observations and cross-platform improvements by @thedotmack in https://github.com/thedotmack/claude-mem/pull/25
+
+## New Contributors
+* @thedotmack made their first contribution in https://github.com/thedotmack/claude-mem/pull/25
+
 **Full Changelog**: https://github.com/thedotmack/claude-mem/compare/v4.2.11...v4.3.0
 
 ## [4.2.10] - 2025-10-25