Allow UTCP Client to support GET,SET and CAPABILITIES

[Raezil]

Summary by cubic

Adds direct gNMI support for Get, Set, and Capabilities in the UTCP gRPC client. These methods now call gnmi.gNMI directly; all other tools still use UTCPService.CallTool.

• New Features
  • Route gnmi.gNMI Capabilities, Get, and Set through dedicated helpers (bypasses UTCP CallTool).
  • Get args: paths ([]string), optional encoding (default JSON_IETF), optional use_models ("name@version").
  • Set args: update/replace/delete arrays; values accept GNMI TypedValue JSON or fall back to string.
  • Responses are returned as JSON objects (protojson -> map).

[cubic-dev-ai]

1 issue found across 1 file

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[cubic-dev-ai]

Missing validation for update path; empty path may unintentionally target device root

Prompt for AI agents

Address the following comment on src/transports/grpc/grpc_transport.go at line 304:

<comment>Missing validation for update path; empty path may unintentionally target device root</comment>

<file context>
@@ -151,21 +169,203 @@ func (t *GRPCClientTransport) CallTool(ctx context.Context, toolName string, arg
 	defer conn.Close()
 
 	client := grpcpb.NewUTCPServiceClient(conn)
+
 	payload, err := json.Marshal(args)
 	if err != nil {
 		return nil, err
 	}
-	resp, err := client.CallTool(ctx, &amp;grpcpb.ToolCallRequest{Tool: toolName, ArgsJson: string(payload)})
</file context>