OpenEnv pelican experiment batch

One experiment batch published by Sergio Paniego: 138 viewable original samples, grouped by 7 source-reported model labels. One truncated row without a PNG was excluded from the 139-row dataset. The date is its publication date, not the exact generation time. Model labels follow the source and are not independently authenticated here. The batch counts as one case; samples are retained separately. This is not a capability ranking.