## Why

AIOps now has traceable payload scope control and improved RAG retrieval, but it still lacks a quality gate comparable to Chat's verifier. A lightweight rule-based verifier can check the most important AIOps risks without introducing another LLM agent.

## What Changes

- Add a rule-based AIOps evaluation service that checks final report quality after the AIOps flow completes.
- Persist the evaluation under `diagnosis_session.self_evaluation.aiops_rule_evaluation`.
- Evaluate payload focus, evidence-tool coverage, and basic report completeness.
- Expose the evaluation through the existing trace API self-evaluation payload.

## Capabilities

### New Capabilities

None.

### Modified Capabilities

- `aiops-traceable-diagnosis-entry`: AIOps sessions include a lightweight rule evaluation for trace replay.

## Impact

- Affects AIOps session finalization and trace self-evaluation.
- Does not change AIOps API input, Agent flow topology, tool signatures, or database schema.
- Does not add an LLM verifier agent.