feat: Plan 10 PR C — de-emphasis signal + counterfactual removal report

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Plan 10 PR C — De-emphasis signal + counterfactual removal report

Depends on: PR A (#32) + PR B (#33, merged)

Changes

deEmphasisService.ts — Three core capabilities:

1. Contribution split — bootstrap vs organic weighted contribution over trailing 30 days. Bootstrap-origin attestations excluded from organic count (decision 6). Independent organic issuers counted by distinct (owner_tenant_id, entity_kind) provenance. 30-day window continuity check.

2. Counterfactual removal report — computeCounterfactualRemovalReport(rootId, targetWeight): loads current graph, overrides root weight to requested target (0, 0.5, etc.), re-runs VeriRank via gRPC (no write), compares per-principal scores against serving tenant's active policy threshold. Report bound to {targetWeight, graphVersion}; validateReportFreshness rejects stale/mismatched reports.

3. Readiness gate — all conditions must hold: ≥3 independent organic issuers, ≥80% organic contribution, continuous 30-day window, no principal drops below serving tenant threshold.

Route — GET /v1/admin/bootstrap/de-emphasis (staff): returns contribution split + per-candidate readiness + counterfactual report.

Tests (6, skip without trust engine)

• 2 vs 3 independent organic issuers flips readiness
• 79% vs 80% organic contribution flips readiness
• Window shorter than 30 continuous days → not ready
• Root removal drops principal below threshold → not ready
• Partial (0.5) and full (0) removal targets produce correct reports
• Stale graph version report is rejected

Plan decisions covered

• Decision 6: bootstrap-origin excluded from organic contribution even after registry removal
• Decision 8: manual + metric-gated, target-weight aware, graph-version bound, no auto-apply

Acceptance criteria met

• GET /v1/admin/bootstrap/de-emphasis returns contribution split + per-candidate counterfactual
• Ready flags match the ≥3 issuers / ≥80% / 30-day / threshold rules
• De-emphasis steps require de_emphasis_reason + approved_by (PR A)
• No automatic de-emphasis (read-only signal)

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📥 Commits

Reviewing files that changed from the base of the PR and between 853434a and 24d9c2e.

📒 Files selected for processing (3)

• control-plane/src/__tests__/integration/bootstrap-de-emphasis.test.ts
• control-plane/src/domains/bootstrap/deEmphasisService.ts
• control-plane/src/routes/admin.ts

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