feat: Migrate blob file context and byte range utilities#130
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Purpose
No Linked issue.
This PR migrates blob-file write context utilities, byte-range coalescing support, global-index file wrappers, and related tests.
FileIndexReaderWrapper: wraps file-index readers and provides a unified interface for reading indexed file metadata.FileIndexWriterWrapper: wraps file-index writers used to emit index data through a common writer interface.ByteRangeCombiner: coalesces adjacent or overlapping byte ranges while respecting hole-size and range-size limits.MultipleBlobFileWriter: manages writing multiple blob files and tracks blob file output metadata.BlobFileContext: carries blob-file write context, options, and file metadata used by write operations.Tests
block_meta_test.cpp: covers SST block metadata behavior.block_write_read_test.cpp: covers SST block write/read behavior.blob_file_context_test.cpp: covers blob-file context behavior.byte_range_combiner_test.cpp: covers byte-range merge, split, and validation behavior.blob_file_context_test.cpp: covers blob-file context behavior.API and Format
Documentation
Generative AI tooling
Migrate-by: Codex