feat: add generated scene skill platform hardening

docs/superpowers/specs/2026-04-19-102-final-coverage-status-rollup-design.md

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+# 102 Final Coverage Status Rollup Design
+
+> Date: 2026-04-19
+> Parent Framework: `2026-04-19-scene-skill-102-full-coverage-framework-design.md`
+> Parent Layer: `Layer E`
+> Status: Active
+
+## Intent
+
+Publish a final, policy-governed coverage rollup after the residual 13 closure sequence.
+
+This design consolidates the latest full-coverage reconciliation candidate view with the residual 13 follow-up reconciliation result. It does not update the official execution board.
+
+## Inputs
+
+1. `tests/fixtures/generated_scene/full_coverage_reconciliation_candidates_2026-04-19.json`
+2. `tests/fixtures/generated_scene/residual_13_reconciliation_candidates_2026-04-19.json`
+3. `tests/fixtures/generated_scene/boundary_residual_hold_decision_2026-04-19.json`
+4. `tests/fixtures/generated_scene/bootstrap_target_residual_isolation_2026-04-19.json`
+5. `tests/fixtures/generated_scene/promotion_board_reconciliation_policy_2026-04-19.json`
+
+## Output
+
+1. `tests/fixtures/generated_scene/final_coverage_status_rollup_2026-04-19.json`
+2. `docs/superpowers/reports/2026-04-19-102-final-coverage-status-rollup-report.md`
+
+## Rollup Rule
+
+Start from the 102-scene full coverage reconciliation candidates.
+
+For every scene present in the residual 13 reconciliation result, replace its previous candidate status with the residual follow-up candidate status.
+
+## Status Model
+
+1. `framework-auto-pass-candidate`
+2. `framework-structured-fail-closed`
+3. `framework-valid-host-bridge`
+4. `source-unreadable`
+5. `unsupported-family`
+6. `misclassified-unresolved`
+7. `missing-source`
+
+## Expected Final Shape
+
+After residual closure:
+
+1. `95` framework auto-pass candidates
+2. `7` structured fail-closed / hold / isolation candidates
+3. `0` unresolved states
+4. `0` source-unreadable states
+5. `0` unsupported-family states
+6. `0` misclassified-unresolved states
+
+## Boundary
+
+This design must not:
+
+1. update `tests/fixtures/generated_scene/scene_execution_board_2026-04-18.json`;
+2. modify `src/generated_scene/analyzer.rs`;
+3. modify `src/generated_scene/generator.rs`;
+4. promote scenes to official board state;
+5. rerun the 102 sweep;
+6. add a family.
+
+## Acceptance Criteria
+
+1. The rollup contains exactly `102` scenes.
+2. Residual 13 updates are applied.
+3. The rollup summary matches the final expected shape.
+4. The official execution board remains untouched.
+5. The report states whether official board reconciliation should be the next step.