grpcproxy: fix CAS writes and AC reads failing against strict gRPC backends#886

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lance-tan-ai wants to merge 5 commits intobuchgr:masterfrom

lance-tan-ai:fix-grpc-proxy-finish-write

Commits on Feb 24, 2026

grpcproxy: set finish_write=true on final ByteStream WriteRequest

lance-tan-ai
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cursoragent
committed
grpcproxy: send explicit FinishWrite message when EOF arrives alone

lance-tan-ai
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cursoragent
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grpcproxy: set write_offset correctly on all WriteRequests

lance-tan-ai
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cursoragent
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grpcproxy: pass size_bytes through on AC GetActionResult proxy requests

lance-tan-ai
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cursoragent
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fix AC proxy reads: thread action digest size_bytes via context

lance-tan-ai
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cursoragent
committed