Add MIT license

LICENSE

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+MIT License
+
+Copyright (c) 2025 ahczhg
+
+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.
+
+---
+
+## Third-Party Licenses and Attributions
+
+This project uses and/or fine-tunes models from third parties, which may be
+subject to their own licenses and terms of use:
+
+### Base Models
+
+1. **Qwen3-0.6B-Base**
+   - Model: Qwen/Qwen3-0.6B-Base
+   - Provider: Alibaba Cloud
+   - License: Apache License 2.0 (or as specified by Alibaba Cloud)
+   - URL: https://huggingface.co/Qwen/Qwen3-0.6B-Base
+
+2. **Llama-3.2-1B**
+   - Model: meta-llama/Llama-3.2-1B
+   - Provider: Meta AI
+   - License: Llama 3.2 Community License Agreement
+   - URL: https://huggingface.co/meta-llama/Llama-3.2-1B
+   - Note: Subject to Meta's acceptable use policy
+
+3. **ERNIE-4.5-0.3B-Base-PT**
+   - Model: baidu/ERNIE-4.5-0.3B-Base-PT
+   - Provider: Baidu
+   - License: Apache License 2.0 (or as specified by Baidu)
+   - URL: https://huggingface.co/baidu/ERNIE-4.5-0.3B-Base-PT
+
+### Dataset
+
+**NVIDIA Aegis AI Content Safety Dataset 2.0**
+- Provider: NVIDIA
+- License: As specified by NVIDIA
+- URL: https://huggingface.co/datasets/nvidia/Aegis-AI-Content-Safety-Dataset-2.0
+
+### Libraries and Dependencies
+
+This project depends on the following open-source libraries:
+
+- **PyTorch**: BSD-style License
+- **Transformers**: Apache License 2.0 (HuggingFace)
+- **PEFT**: Apache License 2.0 (HuggingFace)
+- **TRL**: Apache License 2.0 (HuggingFace)
+- **bitsandbytes**: MIT License
+- **Datasets**: Apache License 2.0 (HuggingFace)
+- **Accelerate**: Apache License 2.0 (HuggingFace)
+- **sentencepiece**: Apache License 2.0
+- **protobuf**: BSD License
+- **scikit-learn**: BSD License
+- **pandas**: BSD License
+- **numpy**: BSD License
+- **matplotlib**: PSF License
+- **seaborn**: BSD License
+
+## Important Notes
+
+1. **Model Usage**: When using fine-tuned models from this project, you must
+   comply with the license terms of the original base models.
+
+2. **Commercial Use**: Some base models may have restrictions on commercial
+   use. Please review the original model licenses before deploying in
+   commercial applications.
+
+3. **Dataset Usage**: The NVIDIA Aegis AI Content Safety Dataset 2.0 may have
+   its own terms of use. Please review the dataset license before use.
+
+4. **No Warranty**: This software is provided "as is" without warranty of any
+   kind. The authors are not responsible for any consequences arising from
+   the use of this software or the fine-tuned models.
+
+5. **Responsible Use**: This project is intended for content safety and
+   moderation purposes. Users must ensure their use complies with applicable
+   laws and ethical guidelines.
+
+## Compliance
+
+Users of this software and the resulting fine-tuned models are responsible for:
+- Complying with all applicable licenses
+- Ensuring their use case is permitted under base model licenses
+- Implementing appropriate safeguards and human oversight
+- Following ethical AI principles and guidelines
+- Respecting privacy and data protection regulations
+
+For questions about licensing, please:
+- Review the original model licenses on HuggingFace
+- Contact the model providers directly
+- Consult with legal counsel for commercial deployments