Add log/*.log to .gitignore and remove development.log

Update .gitignore to exclude all log files in the log/ directory
to prevent them from being tracked in the repository.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: takaokouji

.gitignore

@@ -18,6 +18,7 @@ test/tmp
 test/version_tmp
 tmp
 test/log
+log/*.log
 test_db
 test_db-journal
 .idea