shared: add independent IPv4 and IPv6 collection [CI]

backend/probe/src/MoShiro.Probe/ProbeConfig.cs

@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using MoShiro.Protocol;
 
 namespace MoShiro.Probe;
 
@@ -25,6 +26,12 @@ public sealed class ProbeFile
 
 public sealed class KnownAgent
 {
+    [JsonPropertyName("ip_version")]
+    public string IpVersion { get; set; } = IpVersions.V4;
+
+    [JsonIgnore]
+    public string PathKey => AgentId + "~" + IpVersion;
+
     [JsonPropertyName("agent_id")]
     public string AgentId { get; set; } = "";