P5E Scene Segmentation Fresh Rebuild Execution

• Status: pass / p5e_scene_segmentation_fresh_rebuild_execution_pass
• Source chunks: 1222/1222
• Scene candidates/scenes: 6989/6989
• Non-novel exclusions: 3859
• Entity refs: 6739 scenes / 31530 refs
• Validator failures: 0
• Active route: platform_neutral_prompt_readiness_manual_execution_log_contract

Deterministic scene segmentation only. No chronology/downstream/provider/media/KG/overlay/replay/index mutation.