Add comprehensive documentation for RamanBench dataset mirror and introduce metadata file

README.md

@@ -26,21 +26,16 @@ We compare **28 models**, from the domain standard PLS to modern tabular foundat
 
 - 📦 Package: [github.com/ml-lab-htw/RamanBench](https://github.com/ml-lab-htw/RamanBench) — `pip install raman-bench`
 - 🗂️ Datasets: [github.com/ml-lab-htw/raman_data](https://github.com/ml-lab-htw/raman_data) — `pip install raman-data`
-- 📄 Paper (under review): [arxiv.org/abs/2605.02003](https://arxiv.org/abs/2605.02003)
+- 📄 Paper: [arXiv:2605.02003](https://arxiv.org/abs/2605.02003)
 - ✏️ Suggest a dataset: [PROPOSED_DATASETS.md](https://github.com/ml-lab-htw/RamanBench/blob/main/PROPOSED_DATASETS.md) — community queue for the next benchmark release
 
 ## Citation
 
 ```bibtex
-@misc{koddenbrock2026ramanbench,
-  title         = {{RamanBench}: A Large-Scale Benchmark for Machine Learning on Raman Spectroscopy},
-  author        = {Koddenbrock, Mario and Lange, Christoph and Legner, Robin and Jaeger, Martin
-                   and K{\"o}gler, Martin and Cruz Bournazou, Mariano N. and Neubauer, Peter
-                   and Bie{\ss}mann, Felix and Rodner, Erik},
-  year          = {2026},
-  eprint        = {2605.02003},
-  archivePrefix = {arXiv},
-  primaryClass  = {cs.LG},
-  url           = {https://arxiv.org/abs/2605.02003}
+@article{koddenbrock2026ramanbench,
+  title={RamanBench: A Large-Scale Benchmark for Machine Learning on Raman Spectroscopy},
+  author={Koddenbrock, Mario and Lange, Christoph and Legner, Robin and J{\"a}ger, Martin and K{\"o}gler, Martin and Bournazou, Mariano N Cruz and Neubauer, Peter and Biessmann, Felix and Rodner, Erik},
+  journal={arXiv preprint arXiv:2605.02003},
+  year={2026}
 }
 ```