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.Server/Data/Entities/RoomRoleEntity.cs

@@ -0,0 +1,25 @@
+namespace DorkNet.Server.Data.Entities;
+
+/// <summary>
+/// Per-room player role grant. Drives RoomDetails.CoOwners /
+/// Moderators / Hosts arrays (and their Invited* counterparts when
+/// <see cref="Accepted"/> is false). Each (RoomId, PlayerId, Role)
+/// tuple is unique — granting the same role twice is a no-op.
+/// </summary>
+public class RoomRoleEntity
+{
+    public long Id { get; set; }
+    public long RoomId { get; set; }
+    public long PlayerId { get; set; }
+
+    /// <summary>RoleKind: 0 = CoOwner, 1 = Moderator, 2 = Host.</summary>
+    public int Role { get; set; }
+
+    /// <summary>False while the invite is still pending. Accepted
+    /// rows show up in CoOwners/Moderators/Hosts; pending rows show
+    /// up in InvitedCoOwners/InvitedModerators/InvitedHosts.</summary>
+    public bool Accepted { get; set; } = true;
+
+    public long? GrantedByPlayerId { get; set; }
+    public System.DateTime GrantedAt { get; set; } = System.DateTime.UtcNow;
+}