WIP: add write support #515
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This adds comprehensive write support to the open_as_file() function with efficient memory management and streaming capabilities. Key features: - BufferedStream: SpooledTemporaryFile wrapper with chunked I/O (5MB memory threshold) - Write modes: 'wb' (write), 'ab' (append) - binary only - Adapter pattern: write_from_stream() method (opt-in for adapters) - Compression support: .gz, .bz2, .xz files handled automatically - Local files and S3 URIs supported via FSSpecAdapter - Protocols for type safety: SupportsRead, SupportsWrite Implementation details: - read_from()/write_to() methods use shutil.copyfileobj for chunked copying - Context manager pattern buffers writes and flushes on exit - No breaking changes to existing read functionality
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This PR adds write support. It also introduced a
BufferedStreamwith spooling to a temp directory to prevent high memory pressure when reading for example tracking data.