chore: add mcp-call-log.jsonl to .gitignore

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Andre Ferreira

.gitignore

@@ -102,3 +102,4 @@ compiler/cranelift/target/
 /backup
 lib/chart/native/sciplot/
 .build-cache/
+mcp-call-log.jsonl