Add license

LICENSE

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+This repository is dual-licensed by content type.
+
+================================================================================
+SOFTWARE  ->  Apache License 2.0
+================================================================================
+Applies to: scripts/, *.ipynb (sft_train, rl_train, valuesets_ablation),
+            schema/*.sql
+
+Copyright 2026 Adel Elsayed
+
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+these files except in compliance with the License. You may obtain a copy of the
+License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software distributed
+under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+CONDITIONS OF ANY KIND, either express or implied. See the License for the
+specific language governing permissions and limitations under the License.
+
+Full text: https://www.apache.org/licenses/LICENSE-2.0.txt
+
+Apache-2.0 is used for the code because Creative Commons licenses are not
+intended for software and provide no patent grant.
+
+================================================================================
+PAPER, DOCUMENTATION AND DATA  ->  Creative Commons Attribution 4.0 International
+================================================================================
+Applies to: PAPER.md, README.md, DESIGN.md, METHODOLOGY_LOG.md, MODEL_CARD.md,
+            CITATIONS.md, data/, results/
+
+Copyright 2026 Adel Elsayed
+
+You are free to share (copy and redistribute in any medium or format) and adapt
+(remix, transform, build upon) for any purpose, including commercially, provided
+you give appropriate credit, link to the license, and indicate if changes were
+made.
+
+Full legal text: https://creativecommons.org/licenses/by/4.0/legalcode
+
+================================================================================
+THIRD-PARTY
+================================================================================
+Third-party dependencies retain their own licenses:
+- Synthea (Apache-2.0) -- https://github.com/synthetichealth/synthea
+- Qwen2.5-Coder-14B-Instruct -- see the model's license on Hugging Face
+- DuckDB (MIT), Transformers (Apache-2.0), PEFT (Apache-2.0) -- see their
+  respective repositories
+
+The corpus in data/ is generated entirely from Synthea synthetic patients and
+contains no real patient data.
+
+See CITATIONS.md for the full list of external works this project builds on.