Write a command-line tool aggregate logs that reads a UTF-8 encoded log file and produces a summary of event…

Write a command-line tool aggregate logs that reads a UTF-8 encoded log file and produces a summary of event…: a task in TermGrade Environments: 1,004 executable Linux tasks (Harbor dataset). Input format (TSV, no header): Each line contains 5 tab-separated fields: timestamp\tuser id\tevent…

The task

**Input format (TSV, no header):** Each line contains 5 tab-separated fields: `timestamp\tuser_id\tevent_type\tsession_id\tvalue`

Part of ai-and/termgrade-environments.