perf(runtime): add request-plane msgpack payload codec (cherry-pick of #10437) - #11138
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(cherry picked from commit ac51fc8) Signed-off-by: Yuewei Na <nv-yna@users.noreply.github.com>
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Cherry-picks the request-plane msgpack payload codec from #10437 (squash commit
ac51fc8) ontofeat/deepseek_v4_aa.Why this isn't a clean cherry-pick
feat/deepseek_v4_aaforked frommainon 2026-06-14 and is ~236 commits behind the base #10437 was built on. A rawgit cherry-picktherefore conflicted in 2 of 4 files (environment_names.rs,network.rs) due to ambient-main context bleed — the squash diff carried in symbols from other PRs in the gap.Resolution
Took only #10437's genuine additions; dropped unrelated main-only context that doesn't exist on this branch:
router::DYN_ROUTER_POLICY_CONFIG(not on feat)DEFAULT_SEND_BUFFER_COUNT+ the twostream_options_send_buffer_count_*tests (pre-existing main context, not part of perf(runtime): add request-plane msgpack payload codec #10437)All of #10437's hard dependencies are already present on feat (
rmp-serde,PipelineError::DeserializationError,work_handler::error_types::DESERIALIZATION) — no prerequisite cherry-picks needed.Verification
cargo check -p dynamo-runtime --tests→ clean (exit 0), including the test module where the conflict was.@jthomson04 — requesting your review of the conflict resolution since you authored the original #10437. Follow-up #11104 will be cherry-picked here once it merges.