Analyze the provided log dataset and filter out entries mentioning Testcs

Here are the log lines after filtering out entries that mention "Testcs":

2026-09-30T15:00:00Z [ThreatGuard-Shield-01] EVT-9001 [SUCCESS] [LOW] - Routine health check completed. 2026-09-30T15:05:00Z [ThreatGuard-Shield-01] EVT-9002 [SUCCESS] [LOW] - Signature database updated successfully.

Notes:

• I removed the line containing "Detector Name: Testcs".
• If you want a case-insensitive filter, pattern match, or output in a different format (CSV/JSON), tell me which and I’ll convert it.