Add mirror documentation

README.md

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+---
+license: cc-by-nc-sa-4.0
+tags:
+  - robotics
+  - tactile
+  - multimodal
+  - mirror
+---
+
+# Daimon-Infinity mirror
+
+This repository is a file-preserving mirror of
+[daimonrobotics/Daimon-Infinity on ModelScope](https://modelscope.cn/datasets/daimonrobotics/Daimon-Infinity).
+
+## Source and license
+
+- **Upstream:** `daimonrobotics/Daimon-Infinity`
+- **License:** [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/)
+- **Attribution:** Daimon Robotics / Daimon-Infinity
+
+This mirror keeps the upstream directory layout and is distributed under the
+same CC BY-NC-SA 4.0 license.  No data is altered; files are transferred with
+integrity checks supplied by ModelScope and the Hugging Face Hub.
+
+## Mirror status
+
+Transfer is performed by independent resumable workers.  A file is downloaded
+to ephemeral worker storage, uploaded to this repository, and removed before
+the next file.  Re-running a worker skips paths already present on the Hub.
+
+The upstream dataset is very large (ModelScope lists approximately 38.88 TB),
+so completion will take time and depends on platform throughput.