oracle: run cross-tool oracle on serilog/serilog

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019846YSZ35c7CdkWQ1qX5gm

Author: claude

corpus/oracle-target.txt

@@ -1,3 +1,3 @@
 # oracle target (dev push-trigger). Product code only.
-JoshClose/CsvHelper
+serilog/serilog
 include_tests=false