Benjamin Carlsson 781d89b91e Add cloud client message submission and turn interruption (#59201) ...

## What changed

Expose `add_user_message` for plain-text input using the existing thread configuration, with explicit `StartIfIdle`, `Steer`, and `Queue` modes and typed admission outcomes. Expose `interrupt_turn` to interrupt a specific turn without removing queued input.

Distinguish local validation failures from unknown remote outcomes, require successful final gRPC status, and avoid automatic retries. Preserve client message identity and raw admission payloads; report duplicate admissions by original turn ID without implying current lifecycle status.

Document reconciliation requirements and extend the attach example to submit an optional message while draining events.

## Testing

Add wire-fixture tests for admission variants, request encoding, malformed responses, local validation, redacted diagnostics, uncertain RPC outcomes, final gRPC status requirements, and dropping pending submissions without retrying or interrupting.

GitOrigin-RevId: 1def92de3fc5ca8c1f89431b7ea29b9b80d64600

2026-11-03 18:11:16 +00:00

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attach.rs

Add cloud client message submission and turn interruption (#59201)

2026-11-03 18:11:16 +00:00