Point the Python client at the StreamAlarms alarm feed

Regenerate the Python protobuf stubs and replace query_active_alarms
with stream_alarms, an AsyncIterator over AlarmFeedMessage served by
the gateway's central alarm monitor (snapshot, snapshot_complete, then
live transitions). Drops session_id from the acknowledge surface.

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

clients/python/tests/test_stream_timeout_fallback.py

@@ -1,6 +1,6 @@
 """Regression tests for Client.Python-003: stream timeout-kwarg fallback.
 
-`stream_events_raw` and `query_active_alarms` must tolerate a fake/older stub
+`stream_events_raw` and `stream_alarms` must tolerate a fake/older stub
 that does not accept a ``timeout`` keyword argument, matching the fallback
 already present in `galaxy.watch_deploy_events` and the unary `_unary` helper.
 """
@@ -51,9 +51,9 @@ class _NoTimeoutStubStreamEvents:
         self.StreamEvents = stream
 
 
-class _NoTimeoutStubQueryAlarms:
+class _NoTimeoutStubStreamAlarms:
     def __init__(self, stream: _NoTimeoutStream) -> None:
-        self.QueryActiveAlarms = stream
+        self.StreamAlarms = stream
 
 
 @pytest.mark.asyncio
@@ -78,24 +78,30 @@ async def test_stream_events_raw_falls_back_when_stub_rejects_timeout() -> None:
 
 
 @pytest.mark.asyncio
-async def test_query_active_alarms_falls_back_when_stub_rejects_timeout() -> None:
+async def test_stream_alarms_falls_back_when_stub_rejects_timeout() -> None:
     stream = _NoTimeoutStream(
-        [pb.ActiveAlarmSnapshot(alarm_full_reference="Tank01.Level.HiHi")],
+        [
+            pb.AlarmFeedMessage(
+                active_alarm=pb.ActiveAlarmSnapshot(
+                    alarm_full_reference="Tank01.Level.HiHi",
+                ),
+            ),
+        ],
     )
     client = await GatewayClient.connect(
         ClientOptions(endpoint="fake", plaintext=True, stream_timeout=5.0),
-        stub=_NoTimeoutStubQueryAlarms(stream),
+        stub=_NoTimeoutStubStreamAlarms(stream),
     )
 
     received = [
-        snapshot
-        async for snapshot in client.query_active_alarms(
-            pb.QueryActiveAlarmsRequest(session_id="session-1"),
+        message
+        async for message in client.stream_alarms(
+            pb.StreamAlarmsRequest(),
         )
     ]
 
     assert len(received) == 1
-    assert received[0].alarm_full_reference == "Tank01.Level.HiHi"
+    assert received[0].active_alarm.alarm_full_reference == "Tank01.Level.HiHi"
 
 
 @pytest.mark.asyncio