Add .gitattributes and .gitignore

.gitattributes

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+# Data files via Git LFS
+*.tar filter=lfs diff=lfs merge=lfs -text
+*.zip filter=lfs diff=lfs merge=lfs -text
+*.gz filter=lfs diff=lfs merge=lfs -text
+*.h5 filter=lfs diff=lfs merge=lfs -text
+*.hdf5 filter=lfs diff=lfs merge=lfs -text
+*.npy filter=lfs diff=lfs merge=lfs -text
+*.npz filter=lfs diff=lfs merge=lfs -text
+
+# Image data: binary
+*.png       binary
+*.jpg       binary
+*.jpeg      binary
+*.bmp       binary
+*.gif       binary
+
+# Source / config: LF
+*.py        text eol=lf
+*.sh        text eol=lf
+*.json      text eol=lf
+*.yaml      text eol=lf
+*.yml       text eol=lf
+*.csv       text eol=lf
+*.md        text eol=lf

.gitignore

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+# Large dataset directories (由 Git LFS 或外部管理)
+data/
+datasets/
+*.tar
+*.tar.gz
+*.zip
+
+# Python
+__pycache__/
+*.py[cod]
+
+# IDE / Editor
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+Desktop.ini
+
+# Logs
+*.log
+
+# Jupyter
+.ipynb_checkpoints/