clients: document StreamAlarms + AcknowledgeAlarm in each README

Each client's README now covers the alarms surface in both the SDK
section (StreamAlarms / AcknowledgeAlarm beside the existing
QueryActiveAlarms entry, with the streaming-cancellation note) and
the CLI examples (stream-alarms / acknowledge-alarm invocations
mirroring the in-tree implementations across .NET, Go, Rust, Python,
and Java).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

clients/go/README.md

@@ -84,6 +84,13 @@ goroutine cleanup. Raw protobuf messages remain available through the
 `errors.As` for `GatewayError`, `CommandError`, and `MxAccessError`; command
 errors preserve the raw reply.
 
+For alarms, the package exposes `Client.QueryActiveAlarms` for one-shot
+snapshots, `Client.StreamAlarms` for the server-streaming feed, and
+`Client.AcknowledgeAlarm` to ack an alarm by full reference. The streaming
+call returns a `StreamAlarmsClient`; cancel its context to terminate the
+stream. All three pass straight through to the gateway's central alarm
+monitor.
+
 ## Galaxy Repository browse
 
 The `GalaxyRepository` service (proto package `galaxy_repository.v1`) is a