[python] refactor file_io to interface and optimize rest_token_file_io#7040

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XiaoHongbo-Hope wants to merge 15 commits intoapache:masterfrom

XiaoHongbo-Hope:refactor_fileio

Commits on Jan 14, 2026

refactor file io
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remove duplicate code
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fix accordingly to review comments
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fix import
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fix LocalFileIO init arg
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fix try_to_write_atomic exception handle
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fix write_xxx in rest token file io not delegated issue
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fix local try_to_write_atomic not create parent dir issue
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fix
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fix import
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fix test case failure
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reuse uri_reader_factory when blob_as_descriptor
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fix
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fix
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add cache
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