shared: add independent IPv4 and IPv6 collection [CI]

backend/src/MoShiro.Backend.Application/Ingest/IngestService.cs

@@ -69,7 +69,8 @@ public sealed partial class IngestService
         RawChunkHeader header = chunk.Header;
         long now = _time.GetUtcNow().ToUnixTimeMilliseconds();
         string? problem =
-            header.AgentId != agent ? "agent_id does not match the authenticated node"
+            !IpVersions.IsValid(header.IpVersion) ? "unknown ip_version"
+            : header.AgentId != agent ? "agent_id does not match the authenticated node"
             : header.ChunkId.Value != msgId ? "chunk_id does not match the message id"
             : Kinds.Find(header.Kind) is null ? $"unknown kind {header.Kind}"
             : header.DurationMs is <= 0 or > MaxDurationMs ? "duration out of range"