feat: add generated scene skill platform hardening

docs/superpowers/reports/2026-04-18-g3-candidate-batch-alignment-report.md

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+# G3 Candidate Batch Alignment Report
+
+## Scope
+
+This round no longer leaves the `95598-ticket-family-candidate` ledger cluster as a raw batch queue.
+
+It promotes the batch into a formal `G3` family asset that now records:
+
+1. the `P0` anchor
+2. the first expansion anchor
+3. the second-round promoted expansion baselines
+
+## Delivered
+
+Added or updated:
+
+1. `tests/fixtures/generated_scene/g3_candidate_batch_2026-04-18.json`
+2. `tests/g3_candidate_batch_test.rs`
+3. `tests/fixtures/generated_scene/p1_family_manifest.json`
+4. `tests/fixtures/generated_scene/p1_family_results.json`
+5. `tests/scene_generator_p1_family_test.rs`
+6. `tests/scene_generator_family_policy_test.rs`
+
+## Batch Meaning
+
+The batch asset now freezes five things together:
+
+1. `paginated_enrichment` remains the `G3 / P0-3` anchor baseline
+2. `paginated_enrichment_expansion` remains the first expansion baseline
+3. `paginated_enrichment_expansion_workorder` is the promoted second expansion baseline
+4. `paginated_enrichment_expansion_orderno` is the promoted third expansion baseline
+5. the rest of the `95598-ticket-family-candidate` ledger cluster remains the downstream candidate queue
+
+## Shared Contract Direction
+
+The batch explicitly records the current reusable `G3` contract direction:
+
+1. `archetype = paginated_enrichment`
+2. pagination fields stay in the `page/pageNum/pageNo/pageSize` family
+3. join keys stay in the `ticketNo/workOrderNo/orderNo` family
+4. aggregate rules stay in the `riskLevel/sourceType` family
+
+## Validation
+
+Passed:
+
+1. `cargo test --test g3_candidate_batch_test -- --nocapture`
+2. `cargo test --test scene_generator_test generator_writes_paginated_enrichment_workorder_expansion_fixture -- --nocapture`
+3. `cargo test --test scene_generator_test generator_writes_paginated_enrichment_orderno_expansion_fixture -- --nocapture`
+4. `cargo test --test scene_generator_p1_family_test -- --nocapture`
+5. `cargo test --test scene_generator_family_policy_test -- --nocapture`
+
+## Outcome
+
+`G3` is no longer represented only by one `P0` anchor plus one first expansion fixture.
+
+It now has a promoted batch-expansion asset that already names the second and third concrete expansion baselines, so the next round can continue from code-backed family assets instead of re-selecting candidates from the ledger snapshot.