The Scenario

You are debugging an issue. You grep the logs: grep "Error" logs.txt

Output:

Error: Connection failed
Error: Connection failed
Error: Connection failed

Which user? Which model? Which region? You have no idea.

The Goal

Switch from Text Logging to Structured JSON Logging. Output a JSON object for every log:

{"level": "error", "msg": "Connection failed", "user_id": "u_123", "region": "us-east"}

Requirements:

• Function log_event(level, message, context)
• Output valid JSON string.
• Include timestamp (mocked is fine).