feat(mapper): add streaming split, graph chunk mappers, and graphstore adapter#211
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…e adapter Add internal/streaming with SplitBySize (generic wire-size splitter) and SplitMetadata (entity-based metadata splitter). Add mapper functions for the one-step targethasher.Result → entity GraphChunk conversion (ResultToGraphChunks), and bidirectional entity ↔ proto converters (GraphChunkToProto, ProtoToGraphChunk). Add graphstore adapter (WriteGraphChunks, GraphChunkReader) that hides proto serialization from callers — the orchestrator and controller work with entity types only. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Summary
internal/streaming/withSplitBySize(generic wire-size splitter) andSplitMetadata(returns[]*entity.GraphMetadata). Proto-free package.ResultToGraphChunks: one-steptargethasher.Result→[]entity.GraphChunk(ID mapping + splitting).GraphChunkToProto/ProtoToGraphChunk: bidirectional entity ↔ proto converters.WriteGraphChunks+GraphChunkReader: graphstore adapter that hides proto serialization — callers work with entity types only.core/common) and new implementations coexist — callsite migration follows in the next PR.Test plan
make build && make test— 19/19 passinternal/streaming/streaming_test.go— SplitBySize, SplitMetadata, wire size equivalenceinternal/mapper/target_graph_test.go— ResultToGraphChunks (empty, chunking), GraphChunkToProto round-tripmake gazelle && gofmt -w . && goimports -w .Stack