shared: add independent IPv4 and IPv6 collection [CI]

backend/src/MoShiro.Backend.Api/Public/LiveEndpoints.cs

@@ -33,8 +33,14 @@ public static class LiveEndpoints
 
     private static async Task<IResult> StreamAsync(
         HttpContext http, AgentService agents, LineService lineService, TestService tests, QueryService query, LiveHub hub, SseLimiter limiter,
-        BackendOptions options, BackendCounters counters, TimeProvider time, IHostApplicationLifetime lifetime)
+        BackendOptions options, BackendCounters counters, TimeProvider time, IHostApplicationLifetime lifetime, string? ip_version)
     {
+        string ipVersion = ip_version ?? IpVersions.V4;
+        if (!IpVersions.IsValid(ipVersion))
+        {
+            return Problems.From(http, ValidationError.Single("ip_version", "must be ipv4 or ipv6"));
+        }
+
         StringValues raw = http.Request.Query["topics"];
         Result<IReadOnlyList<LiveTopic>> parsed = LiveTopic.ParseAll(raw.Where(v => v is not null)!, options.MaxSseTopics);
         if (!parsed.TryGet(out IReadOnlyList<LiveTopic>? topics, out FleetError? error))
@@ -78,7 +84,7 @@ public static class LiveEndpoints
             http.Response.Headers["X-Accel-Buffering"] = "no";
             await http.Response.Body.FlushAsync(http.RequestAborted);
 
-            var session = new LiveSession(http, agents, lineService, tests, query, hub, options, time, topics, lineKeys);
+            var session = new LiveSession(http, agents, lineService, tests, query, hub, options, time, topics, lineKeys, ipVersion);
             using var linked = CancellationTokenSource.CreateLinkedTokenSource(http.RequestAborted, lifetime.ApplicationStopping);
             await session.RunAsync(linked.Token);
         }
@@ -101,6 +107,7 @@ public static class LiveEndpoints
         private readonly AgentService _agents;
         private readonly LineService _lines;
         private readonly IReadOnlyDictionary<string, LineKey> _lineKeys;
+        private readonly string _ipVersion;
         private readonly TestService _tests;
         private readonly QueryService _query;
         private readonly LiveHub _hub;
@@ -117,12 +124,13 @@ public static class LiveEndpoints
         private long _lastWriteMs;
         private long _lastPeriodicMs;
 
-        public LiveSession(HttpContext http, AgentService agents, LineService lines, TestService tests, QueryService query, LiveHub hub, BackendOptions options, TimeProvider time, IReadOnlyList<LiveTopic> topics, IReadOnlyDictionary<string, LineKey> lineKeys)
+        public LiveSession(HttpContext http, AgentService agents, LineService lines, TestService tests, QueryService query, LiveHub hub, BackendOptions options, TimeProvider time, IReadOnlyList<LiveTopic> topics, IReadOnlyDictionary<string, LineKey> lineKeys, string ipVersion)
         {
             _http = http;
             _agents = agents;
             _lines = lines;
             _lineKeys = lineKeys;
+            _ipVersion = ipVersion;
             _tests = tests;
             _query = query;
             _hub = hub;
@@ -297,7 +305,7 @@ public static class LiveEndpoints
         {
             MetricSelection selection = MetricSelection.Resolve(null, topic.Preset, _options.MaxMetricsPerQuery).Value;
             IReadOnlyList<LineView> visible = await _lines.ListAsync(a => a.Agent.Status == Fleet.Server.NodeStatus.Active && IsVisible(a), ct);
-            Result<OverviewResult> result = await _query.OverviewAsync(visible, new RangeRequest(topic.Range, null, null, null, null), selection, ct);
+            Result<OverviewResult> result = await _query.OverviewAsync([.. visible.Where(l => l.IpVersion == _ipVersion)], new RangeRequest(topic.Range, null, null, null, null), selection, ct);
             if (result.TryGet(out OverviewResult? overview, out _))
             {
                 var dto = new OverviewDto(