Update changelog

Author: sualeh

changelog.md

@@ -3,7 +3,14 @@
 SchemaCrawler AI release notes.
 
 <a name="v16.27.2-1"></a>
-## Release 16.27.2-1 - 2025-08-25
+## Release 16.27.2-1 - 2025-09-03
+
+- Allow MCP Server to be started entirely from environmental variables
+- Start MCP Server in an error state if a database connection cannot be made
+
+
+<a name="v16.27.1-1"></a>
+## Release 16.27.1-1 - 2025-08-25
 
 - Show objects referenced by routines
 - Add lint function to MCP server (and remove it from 'aichat')