Failure pattern tools leak across workspaces

[lukacf]

Problem

Failure patterns are listed globally with no workspace scoping. list_failure_patterns exposes patterns from other workspaces, including potentially sensitive symptom/root_cause strings.

Impact

Cross-workspace information leak by default.

Suggested Fix

Namespace patterns by workspace and/or redact or filter outputs based on requester context.

References

• src/goldfish/server_tools/svs_tools.py list_failure_patterns
• db failure_patterns.source_workspace