[ActivePeter]

External Owner-local PUTs currently wait for Master route publication after the values are already locally readable. Return success after local commit and handoff to the existing Owner publication task, removing Master publication latency from the PUT completion path used by SGLang KV cache writes.

The Owner task continues to hold pending contexts and per-key fences through publication, retry, and terminal cleanup. Successful completion confirms local commit; global route visibility remains eventual, and cross-owner readers must use actual GET results. Background publication failures are logged and handled by the existing publication lifecycle.

Update the regression coverage for both transfer-end and commit entrypoints to check acknowledgement while publication is paused, retained fences and readable holders after the caller leaves, eventual publication, and safe cleanup of independently rejected items. Tests that require a global route now wait for publication explicitly.

Validation:

• The release build containing the production change completed successfully.
• Llama-3.1-8B-Instruct ShareGPT replay: four TP1 workers, eight offered QPS levels from 5 to 40, two repetitions each; all 23,392 requests succeeded. Actual multi-turn histories, output lengths, phase ordering, cache accounting, and per-run cleanup were checked.
• Mean TTFT across the two repetitions was 6.3–25.1% below the historical reference across the eight QPS levels. The historical and current runs used different hosts, so these measurements do not isolate the effect of this change.
• The updated Rust regressions await CI execution; the benchmark results do not establish that the full CI suite passes.