timestamp,level,message,extra
2024-01-15T10:00:00Z,INFO,Valid 4-column row,data
2024-01-15T10:00:05Z,WARN,Missing extra column
2024-01-15T10:00:10Z,ERROR,Extra,column,here,too,many
2024-01-15T10:00:15Z,INFO,Valid row,more_data
2024-01-15T10:00:20Z,DEBUG
2024-01-15T10:00:25Z,INFO,Another valid,row
2024-01-15T10:00:30Z,WARN,Quoted "comma, inside",value
2024-01-15T10:00:35Z,ERROR,Missing,
2024-01-15T10:00:40Z,INFO,Valid,data
2024-01-15T10:00:45Z,CRITICAL,Final,row,good