update changelog

Author: michalsn

user_guide_src/source/changelogs/v4.8.0.rst

@@ -24,6 +24,7 @@ Behavior Changes
 ================
 
 - **Commands:** The ``filter:check`` command now requires the HTTP method argument to be uppercase (e.g., ``spark filter:check GET /`` instead of ``spark filter:check get /``).
+- **Database:** The Postgre driver now sets ``PGSQL_ERRORS_VERBOSE`` on connect. Error messages returned by ``$db->error()['message']``, thrown exceptions, and log entries now include the 5-character SQLSTATE code (e.g., ``ERROR:  42P01: relation "x" does not exist`` instead of ``ERROR:  relation "x" does not exist``). Code that matches against exact Postgre error message strings may need updating.
 
 Interface Changes
 =================