Copy LICENSE-CODE from Nickyang/RazorCal

LICENSE-CODE

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+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   All code files in this repository (files under `scripts/` and `examples/`,
+   plus this LICENSE-CODE, `README.md`, `FIDELITY_AUDIT.md`)
+   are 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.
+
+   NOTE: The **dataset itself** (files under `data/`) is redistributed under
+   the union of upstream dataset licenses. See `LICENSE` for details.
+
+   Copyright 2026 RazorCal contributors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file 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.