toy-v1.0: stochastic multi-prefix preview

This independent PR adds a compact Toy-v1.0 stochastic-interaction preview under
v1.0/ without changing upstream v0 or the separate v0.1/v0.2 proposal PR.

The current upload is the audited 768-clip multi-prefix preflight: 32 exact-current
configurations, three behavioral policy histories, and eight natural future seeds per
prefix. It includes split archives, manifest/config, actual-sample qualitative media,
generation and independent-audit metrics, and a standalone generator/test package.

All registered data and corrected audit gates pass. This is intentionally labeled a
preview rather than a full release: the planned 5,376-clip expansion is not included,
and no learned-latent, diffusion, or world-model claim is made. We plan to update this
PR after the next registered representation/generator gates and maintainer feedback.

Updated this PR with the audited Toy-v1.0 full release.

• 5,376 clips: 3,696 train / 840 validation / 840 evaluation
• 64 physics groups, two appearance rerenders, three policy histories, 14 natural futures
• independent audit: 20/20 checks passed
• manifest SHA-256: af6f6b766fe515096a71ee19d9c7dc36d9400bdc7c96d57e6213644c5c4cbb40

The earlier 768-clip preflight remains under v1.0/preflight/ as provenance. The new selected artifact is under v1.0/full/.

Added the audited Toy-v1.1 continuous-contact release to this PR.

• 2,048 RGB clips from 1,024 deterministic trajectories
• 64 physics groups × 16 continuous controls × 2 exact-state appearance rerenders
• split: 1,408 train / 320 validation / 320 evaluation
• exact current-frame RGB at X24 across controls within each appearance; distinct past histories
• generation, independent all-clip/archive audit, gallery, 32/32 regeneration, and standalone tests pass
• manifest SHA-256: 8455631cb93d2a13ff60272625baf0a84dc944439a1428481580831500d01919

Actual registered sample GIF (columns vary the continuous control; rows are exact-state appearance rerenders):

The new release is under v1.1/; the existing v1.0/ files are unchanged. This is dataset evidence only and remains an open, independently implemented PDI-compatible proposal.