Add cleanup for WRI$_ADV_* tables (can accumulate millions of rows/GBs), scheduler$_event_log truncate, and automatic UNDO/SYSAUX datafile resize with progressive fallback (2G→4G→6G). Tested on Oracle 18c XE. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>