Import march-2020-03-10 from private repo (scrubbed 2026-05-27)

Targets Rec Room 2020.03.10 client (also serves 2020.03.06).

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 dorknet-clientpatch-{key}.zip
  for v1-march-* Release uploads.
- .github/workflows/release.yml — on tag push publishes both
  dorknet-server-march_2020_03_10-win-x64.zip and
  dorknet-clientpatch-march_2020_03_10.zip as Release assets.

Same scrub rules as december; tools/build-patcher-zip.ps1 added to
the maintainer-side allow-list so it survives.

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,
+}