add LICENSE

LICENSE

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+QuantFunc Model License — PLACEHOLDER (replace with your finalized terms)
+Copyright (c) 2026 QuantFunc.
+
+IMPORTANT: This is a placeholder notice, not a finalized license and not legal
+advice. Replace the body below with your reviewed commercial/redistribution
+terms before relying on it.
+
+1. Upstream base model. The weights in this repository are a quantized
+   derivative of an upstream base model that is licensed separately under the
+   Apache License 2.0. A copy of that license is included as LICENSE-APACHE, and
+   the upstream copyright/attribution notices are retained (see the
+   "License & Attribution" section of the README). Nothing here diminishes the
+   rights granted to you in the unmodified upstream model by its Apache-2.0
+   license.
+
+2. QuantFunc artifacts. The QuantFunc-specific contributions in this repository
+   (the quantized weight artifacts, precision configs, and packaging produced by
+   the QuantFunc inference engine) are Copyright (c) 2026 QuantFunc. All rights
+   in those contributions are reserved except as expressly granted by the
+   upstream Apache-2.0 license for the underlying model or by a separate written
+   agreement with QuantFunc.
+
+3. Trademarks. No rights are granted in the "QuantFunc" name or logo, nor in any
+   third-party trademark (including those of the upstream model authors).
+
+4. No warranty. THE ARTIFACTS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED. IN NO EVENT SHALL QUANTFUNC BE LIABLE FOR ANY CLAIM,
+   DAMAGES, OR OTHER LIABILITY ARISING FROM THE ARTIFACTS OR THEIR USE.
+
+For licensing inquiries: <add contact>.