feat(grpc_datasource): add ConnectRPC transport for gRPC datasource#1480

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fengyuwusong wants to merge 7 commits intowundergraph:masterfrom

fengyuwusong:feat/connectrpc-grpctest-buf

Commits on Apr 30, 2026

feat: add ConnectRPC datasource support via RPCTransport abstraction

fengyuwusong
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claude
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fix(grpc_datasource): base64-encode binary metadata headers in Connect transport

fengyuwusong
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claude
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fix(grpc_datasource): add nil guard and response size limit in transports

fengyuwusong
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claude
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fix(grpc_datasource): detect oversized responses and truncate error bodies

fengyuwusong
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claude
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chore(grpctest): generate Connect handlers via buf
fengyuwusong
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fix(grpc_datasource): use NewDataSourceGRPC in tests added since rebase base
fengyuwusong
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test(grpc_datasource): exercise data source over Connect transport
fengyuwusong
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