World Model Directory: citable 56-model snapshot

The dataset already contains 56 entries, while the README still says 51. This corrects the count and adds a flat CSV export, dataset card, citation metadata and a SHA-256 manifest so downstream readers can cite a specific snapshot.

The source-review date remains November 3, 2026. The November 9 packaging date is explicit; no fresh capability reviews, performance measurements or additional models are claimed. The original models.json is unchanged.

Validation: inspected JSON/CSV row counts and preserved the original data hash. No test or build commands were run.