Improve gateway reliability and dashboard docs

clients/python/src/mxgateway/client.py

@@ -74,9 +74,9 @@ class GatewayClient:
         if self._closed:
             return
 
-        self._closed = True
         if self._channel is not None:
             await self._channel.close()
+        self._closed = True
 
     async def open_session(
         self,
@@ -124,10 +124,10 @@ class GatewayClient:
     ) -> AsyncIterator[pb.MxEvent]:
         """Return an async event iterator and cancel the stream when iteration stops."""
 
-        call = self.raw_stub.StreamEvents(
-            request,
-            metadata=merge_metadata(self.options.api_key, metadata),
-        )
+        kwargs: dict[str, Any] = {"metadata": merge_metadata(self.options.api_key, metadata)}
+        if self.options.stream_timeout is not None:
+            kwargs["timeout"] = self.options.stream_timeout
+        call = self.raw_stub.StreamEvents(request, **kwargs)
         return _canceling_iterator(call)
 
     async def _unary(
@@ -138,10 +138,16 @@ class GatewayClient:
         *,
         metadata: Sequence[tuple[str, str]] | None = None,
     ) -> Any:
-        call = method(
-            request,
-            metadata=merge_metadata(self.options.api_key, metadata),
-        )
+        kwargs: dict[str, Any] = {"metadata": merge_metadata(self.options.api_key, metadata)}
+        if self.options.call_timeout is not None:
+            kwargs["timeout"] = self.options.call_timeout
+        try:
+            call = method(request, **kwargs)
+        except TypeError as error:
+            if "timeout" not in kwargs or "unexpected keyword argument 'timeout'" not in str(error):
+                raise
+            kwargs.pop("timeout")
+            call = method(request, **kwargs)
         try:
             return await call
         except asyncio.CancelledError: