Retry 2 clips: silver-jar→silver-can prompts, pat-turkey unified bowl-of-turkey compound

Step 1 full re-run @ 15fps with compound+fallback prompts and containment merge (55 clips)

Replace samples/ with 21-clip Step 1 test batch (no SAM3D, no 6DoF)

Refresh dataset: 48 trim-reviewed clips, manual SAM3 prompts, full descriptions in scene.json