Adaptive PlayTime diagrams

The DevCentr specifications component now consumes generated PlayTime diagram copies from canonical dev-centr/scriptbook commit 97534371f0da8d81e495cb4cc069704902dbdd69.

Each of the twelve diagrams has three deliverables under docs/modules/specifications/images: a standalone-adaptive SVG at its existing public image path, a host-themed SVG for runtime insertion, and the former hand-authored SVG preserved as a fixed asset. Mermaid sources and theme manifests remain only in Scriptbook.

scripts/sync-playtime-diagrams.ps1 reads the pinned commit and blob identifiers from playtime-diagrams.provenance.sdl. Its Sync mode copies exact generated Git blobs from a local canonical clone. Its default Check mode validates committed checksums without requiring that clone and also rejects duplicated Mermaid sources or theme manifests.

All existing AsciiDoc references carry the themed-svg role for progressive runtime delivery.