Test, validate and match regular expressions
This regex matches log lines formatted with a timestamp (YYYY.MM.DD HH:MM:SS), followed by a bracketed alphabetic level (e.g., INFO, ERROR), and two more bracketed fields that capture context and message content. It is designed to parse structured log entries, capturing each component into separate groups for extraction and analysis. Use cases include log monitoring, filtering, and transforming log data into structured formats. The 'gm' flags enable global matching across multiple lines for efficient processing of large log files.