Import december-2020-12-18 from private repo (scrubbed 2026-05-27)

Targets Rec Room 2020.12.18 client.

Re-import after adding:
- DorkNet.ClientMod/dorknet-clientmod.json.template — config schema
  the launcher's manifest-driven patcher renders into UserData/.
- tools/build-patcher-zip.ps1 — produces the dorknet-clientpatch-{key}.zip
  Release asset the launcher fetches.
- .github/workflows/release.yml — auto-publishes both Release assets
  on v1-december-* tag push.

Scrubbed via maintainer-side scrub-for-public.ps1: same drop rules as
the prior import, plus build-patcher-zip.ps1 added to the tools/
allow-list so it survives the scrub.

DorkNet.Models/Relationships/Relationship.cs

@@ -0,0 +1,27 @@
+using System.Text.Json.Serialization;
+
+namespace DorkNet.Models.Relationships;
+
+public class RelationshipData
+{
+    [JsonPropertyName("AccountId")]
+    public long AccountId { get; set; }
+
+    [JsonPropertyName("OtherAccountId")]
+    public long OtherAccountId { get; set; }
+
+    [JsonPropertyName("Status")]
+    public RelationshipStatus Status { get; set; }
+
+    [JsonPropertyName("CreatedAt")]
+    public DateTime CreatedAt { get; set; }
+}
+
+public enum RelationshipStatus
+{
+    None = 0,
+    Friend = 1,
+    PendingSent = 2,
+    PendingReceived = 3,
+    Blocked = 4,
+}