Add third-party license supplements for public benchmark distribution

Supplementary notices only; frozen benchmark files, tags, scores and hashes are unchanged.

license-notices/README.md

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+# Supplemental license notices
+
+These notices supplement, and do not replace, the release LICENSE.md, NOTICE,
+source ledger, font notices or rights granted by third parties. Frozen release
+files and their hashes are unchanged.
+
+- `tasks/` and task texts in `data/`: WebGen-Bench task data, MIT. Full standard
+  permission text and attribution are in `WebGen-Bench-MIT.txt`.
+- Cutaste / Taste Bench authored scoring rules, configurations, dataset cards,
+  tables and ledgers retain their existing CC BY 4.0 grant. Attribute:
+  “Cutaste / Taste Bench — public benchmark”, Validflow,
+  https://huggingface.co/datasets/Validflow/cutaste-base
+  (include the release tag used, such as `base-2026Q4.1-preview`).
+  License: https://creativecommons.org/licenses/by/4.0/ .
+- `assets/fonts/v1/`: original font licenses remain in
+  `assets/fonts/v1/licenses/`. The fixed font pack consists of Liberation 2,
+  Caladea, Carlito, DejaVu and Noto Color Emoji. It is distinct from fonts that
+  generated pages may contain in the separate results repository.
+
+This dataset contains benchmark material, not the proprietary Cutaste CLI source.

license-notices/WebGen-Bench-MIT.txt

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+WebGen-Bench task data — MIT license notice
+
+Source dataset: https://huggingface.co/datasets/luzimu/WebGen-Bench
+Pinned upstream revision: c061fe8326459846ac020ceb54d750c859cb059f
+Upstream dataset card declares license: mit. Upstream does not ship a separate
+LICENSE file at this revision. The attribution below is preserved from the
+Cutaste release ledger; the permission text is the standard MIT License.
+
+Copyright (c) the WebGen-Bench authors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.