Add NOTICE attributing upstream Qwen Team

NOTICE

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+Qwen3-Reranker-4B (OpenVINO IR conversion)
+
+This OpenVINO IR conversion is a derivative of Qwen/Qwen3-Reranker-4B
+(https://huggingface.co/Qwen/Qwen3-Reranker-4B), redistributed under the
+Apache License, Version 2.0.
+
+Original work:
+  Copyright 2024-2025 Alibaba Cloud (Qwen Team).
+  Licensed under the Apache License, Version 2.0.
+
+Modifications by the redistributor of this OpenVINO conversion:
+  - Exported model weights to OpenVINO IR via optimum-intel.
+  - Applied NNCF INT8 (asymmetric, weight-only) quantization.
+  - Generated OpenVINO Tokenizer / Detokenizer IR via openvino-tokenizers.
+
+No model weights were retrained. Tokenizer vocabulary, chat template, and
+generation config are preserved verbatim from the upstream release.