docs: add required licences

NOTICES.md

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+# Third-Party Software Licenses and Attributions
+
+This software includes the following third-party components that are subject to separate license terms:
+
+## Restic
+
+- **Version**: [Specify the version you're shipping]
+- **Copyright**: Copyright (c) 2014, Alexander Neumann <alexander@bumpern.de>
+- **License**: BSD 2-Clause License
+- **Status**: Included unchanged
+- **Source**: https://github.com/restic/restic
+- **Full License Text**: See [LICENSES/BSD-2-Clause-Restic.txt](LICENSES/BSD-2-Clause-Restic.txt)
+
+Restic is a backup program that is fast, secure, and efficient. It's included in this distribution as-is without any modifications.
+
+---
+
+## License Information
+
+The main source code of this project is licensed under the GNU Affero General Public License v3. See the [LICENSE](LICENSE) file for details.
+
+Each third-party component retains its original copyright and license. When distributing this software:
+
+1. The original license of each component must be preserved
+2. Copyright notices must be retained
+3. A notice of changes (if any) must be provided for modified components
+4. The original license file should be included with distributions
+
+For more information about a specific component's license, refer to the corresponding license file in the [LICENSES/](LICENSES/) directory.