Add omitempty to MCPGroupStatus JSON fields

Add omitempty to servers and serverCount JSON tags in
MCPGroupStatus so optional fields are omitted from serialized
output when empty, consistent with other optional fields in
the struct.

Fixes #4537

Signed-off-by: Sharan Raj T <sharanrajtm@gmail.com>

Author: sharanrajt

cmd/thv-operator/api/v1beta1/mcpgroup_types.go

@@ -28,11 +28,11 @@ type MCPGroupStatus struct {
 	// Servers lists MCPServer names in this group
 	// +listType=set
 	// +optional
-	Servers []string `json:"servers"`
+	Servers []string `json:"servers,omitempty"`
 
 	// ServerCount is the number of MCPServers
 	// +optional
-	ServerCount int32 `json:"serverCount"`
+	ServerCount int32 `json:"serverCount,omitempty"`
 
 	// RemoteProxies lists MCPRemoteProxy names in this group
 	// +listType=set