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Client.Dotnet-004: documented DefaultCallTimeout as both the per-attempt deadline and the shared retry budget, and removed DeadlineExceeded from the transient-retry set (a client-imposed deadline cannot be helped by retrying). Client.Dotnet-005: RegisterAsync/AddItemAsync/AddItem2Async silently returned 0 when a successful reply lacked the typed payload. They now throw a descriptive MxGatewayException. Client.Dotnet-006: added XML docs to the previously undocumented public members MaxGrpcMessageBytes, GatewayProtocolVersion, WorkerProtocolVersion. Client.Dotnet-007: corrected the AcknowledgeAlarmAsync XML comment — the RPC requires the admin scope, not a non-existent invoke:alarm-ack sub-scope. Client.Dotnet-008: the CLI redactor missed env-var-sourced keys because the caller passed only the --api-key option. Redaction now uses the same resolver, stripping env-var keys too. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>