feat: add generated scene skill platform hardening

docs/superpowers/reports/2026-04-18-g3-next-round-expansion-report.md

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+# G3 Next-Round Expansion Report
+
+## Scope
+
+This round continues consuming the `95598-ticket-family-candidate` downstream queue instead of stopping at the second-round expansion baselines.
+
+Added fixtures:
+
+1. `tests/fixtures/generated_scene/paginated_enrichment_expansion_source_distribution`
+2. `tests/fixtures/generated_scene/paginated_enrichment_expansion_service_risk`
+
+## Contract Variants Added
+
+The next round validates two more `G3` reusable variants:
+
+1. `pageNum + ticketNo + aggregate:sourceType`
+2. `pageNo + ticketNo + aggregate:riskLevel`
+
+## Delivered
+
+Updated:
+
+1. `tests/fixtures/generated_scene/p1_family_manifest.json`
+2. `tests/fixtures/generated_scene/p1_family_results.json`
+3. `tests/fixtures/generated_scene/g3_candidate_batch_2026-04-18.json`
+4. `tests/g3_candidate_batch_test.rs`
+5. `tests/scene_generator_test.rs`
+6. `tests/scene_generator_p1_family_test.rs`
+
+## Validation
+
+Passed:
+
+1. deterministic analysis for both new fixtures
+2. package generation for both new fixtures
+3. family-level reusable migration assertions for both new fixtures
+4. batch-asset assertions for the promoted fourth and fifth expansion anchors
+
+## Outcome
+
+`G3` now has:
+
+1. one `P0` anchor
+2. one first expansion fixture
+3. two second-round expansion fixtures
+4. two next-round promoted expansion fixtures
+
+The current `paginated_enrichment` family baseline is now validated across:
+
+1. `ticketNo`
+2. `workOrderNo`
+3. `orderNo`
+
+and across both `riskLevel` and `sourceType` aggregate families with supported pagination-field variants.