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.Server/Data/Entities/RoomBanEntity.cs

@@ -0,0 +1,28 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace DorkNet.Server.Data.Entities;
+
+/// <summary>
+/// One per-room ban issued by a room owner / admin via
+/// <c>POST /api/rooms/v2/banfromroom</c>. The match service consults
+/// these rows when resolving an instance join: if the joining player
+/// has an active row matching the room id, the join is refused.
+/// </summary>
+public class RoomBanEntity
+{
+    public long Id { get; set; }
+    public long RoomId { get; set; }
+    public long BannedPlayerId { get; set; }
+    public long BannedByPlayerId { get; set; }
+
+    /// <summary>BanType enum mirror: 0 = Soft (kick), 1 = Permanent,
+    /// 2 = Temporary (until <see cref="Until"/>).</summary>
+    public int BanType { get; set; }
+
+    public DateTime? Until { get; set; }
+
+    [MaxLength(512)]
+    public string Reason { get; set; } = string.Empty;
+
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+}