Add parametrized edge-case tests for extreme metric scenarios

[ProtocolWarden]

Auto-generated by Operations Center execution.

Goal

Add parametrized edge-case tests for extreme metric scenarios

Definition of done (complete ALL before finishing)

1. Complete the task in its ENTIRETY — every acceptance criterion and every
   file the task implies (implementation, tests, and docs as applicable). Do
   not leave TODOs, stubs, or 'follow-up' gaps; a partial change is rejected
   in review.
2. Add or update tests/checks that prove the work is correct.
3. Run the repository's test suite and linters/formatters and make them
   pass locally. If anything fails, fix it before finishing — do not hand
   off a red build.
4. Only consider the task done when the full change is in place AND verified
   green. The PR you open should be mergeable as-is.

[ProtocolWarden]

Resolved: superseded by new push — re-review resumed

Self-review concerns — auto-fixing (up to 6 attempts; re-queued if still unresolved):

Campaign objective specifies testing both observer metrics (CollectorMetrics, SystemMetrics) AND tuning metrics (aggregate_family_metrics), but implementation only covers observer metrics. Missing: aggregate_family_metrics edge-case tests. File naming is misleading: test_tuning_metrics_extreme_scenarios.py actually contains observer metric tests, not tuning metric tests. Code quality is excellent (proper headers, docstrings, parametrization, all tests passing, ruff clean, type checking passes), but scope does not match spec.

[ProtocolWarden]

Resolved: new push — automated review resumed

Needs human attention (reason=ci_persistently_red). Left open — not merged (unresolved) and not closed (work preserved).

CI has not gone green after 20 checks (1 failing: audit: failure). Not merged (red CI) and not closed (work preserved) — needs a human to fix CI.