feat: deployment-aware agentic risk amplification scoring

[arunSunnyKVS]

What & why

Findings today carry a static severity label (low/high/critical) that never changes with the deployment, plus a cosmetic per-evaluator "Avg Score" that averages judge scores — and averaging hides breaches (9 9 2 → 6.7 reads healthy while one attack got through).

This PR adds a deployment-aware per-evaluator risk score (0–10): the severity label is a floor, amplified by the target's agentic power, so the same flaw scores higher on an autonomous, tool-rich, multi-tenant agent than on a read-only chatbot. Follows the OWASP AIVSS amplification model, reduced to something fully automatic.

Closes #200. Follow-ups: #201 (LLM profile enrichment), #202 (headline integration), #203 (MCP tools/list signal).

Changes in this PR

1. Deployment-aware risk amplification (original commit)

• amplifiedRisk(severity, isFinding, power) — base + (10 - base) * power, with CVSS/AIVSS band floors (critical 9.0, high 7.0, medium 4.0, low 1.0).
• deriveAgentProfile() — deterministic, no-LLM heuristic that infers the power profile from businessUseCase + target metadata.
• Report rendering: "Base Sev" + "Risk (this agent)" columns, with agent power rationale caption.

2. Three refinement fixes (second commit)

Fix 1 — Remove stateful flag from persistence factor.
The transport-level stateful flag (which controls whether Opfor sends full chat history or uses session IDs) was incorrectly boosting the persistence score. Only semantic memory signals (memory, persistent, knowledge base, RAG, vector store) now count.

Fix 2 — Use target.description alongside businessUseCase.
The agent power profile now scans both target.description (required, always present) and businessUseCase (optional), concatenated into a single text corpus via buildProfileText(). Keywords fire even when businessUseCase is omitted.

Fix 3 — Factor worst judge score into amplifiedRisk.
The formula now accepts worstJudgeScore — the lowest judge score across FAIL attacks in an evaluator. Inverted to a risk floor (10 - score) and taken as max(severityFloor, judgeRisk). A devastating breach on a low-severity evaluator (e.g. judge score 1 on a low evaluator) correctly raises the risk base from 1.0 to 9.0.

// Old formula
risk = base + (10 - base) * power

// New formula
effectiveBase = max(BASE_RISK[severity], 10 - worstJudgeScore)
risk = effectiveBase + (10 - effectiveBase) * power

3. Scoring reference documentation

Added docs/scoring.md — comprehensive scoring reference covering all three layers (judge verdict, severity-weighted headlines, agentic risk amplification) with a full end-to-end worked example and edge cases.

Scope / safety

• The headline Safety Score and summary shape are untouched — feeding amplified risk into the headline is deliberately deferred to Risk scoring: integrate amplified risk into the headline Safety Score #202.
• risk is additive optional metadata; runs without a profile simply carry no risk.
• The worstJudgeScore parameter is optional — omitting it produces identical results to the original formula (backward compatible).

Testing

• Unit tests: core/tests/amplify.test.ts (19 tests including 7 new for judge score integration), core/tests/agentProfile.test.ts (9 tests, updated for target.description signals and stateful exclusion).
• All 189 tests pass, 0 failures. npm run build + npm run typecheck green.

Files changed

File	Change
core/src/execute/amplify.ts	Added optional worstJudgeScore param, effectiveBase = max(floor, judgeRisk)
core/src/execute/agentProfile.ts	buildProfileText() concatenates description + businessUseCase; removed stateful from persistence; refined MEMORY_WORDS
core/src/execute/aggregate.ts	Added worstJudgeScore() helper; passes worst score to amplifiedRisk
core/tests/amplify.test.ts	7 new tests for judge score integration
core/tests/agentProfile.test.ts	Updated for description signals, stateful exclusion, RAG/vector keywords
docs/scoring.md	New — comprehensive scoring reference with worked examples
README.md	Updated risk scoring section to mention judge score integration + link to docs

[coderabbitai]

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The changes satisfy #200 by adding pure amplification and profile heuristics, surfacing risk in reports, and preserving summary shape.
Out of Scope Changes check	✅ Passed	The README, report, execution, and test changes all support the stated risk-scoring objective with no unrelated scope detected.
Title check	✅ Passed	The title succinctly matches the main change: deployment-aware risk amplification scoring.
Description check	✅ Passed	The description covers the problem, solution, changes, issue linkage, and testing, even though it uses custom section headings.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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