Re-add IAdminRemarksCommon to DB model for SS14.Admin (#27028)

This was removed in #25280 as the relevant DB entities didn't go outside the DB layer anymore. SS14.Admin however still uses them directly (as it only supports Postgres), so the interface is still useful there.

(cherry picked from commit bbf0505fdc0f49a40a66473296f912cb4d580cb9)

Content.Server.Database/Model.cs

@@ -875,8 +875,35 @@ namespace Content.Server.Database
         public byte[] Data { get; set; } = default!;
     }
 
+    // Note: this interface isn't used by the game, but it *is* used by SS14.Admin.
+    // Don't remove! Or face the consequences!
+    public interface IAdminRemarksCommon
+    {
+        public int Id { get; }
+
+        public int? RoundId { get; }
+        public Round? Round { get; }
+
+        public Guid? PlayerUserId { get; }
+        public Player? Player { get; }
+        public TimeSpan PlaytimeAtNote { get; }
+
+        public string Message { get; }
+
+        public Player? CreatedBy { get; }
+
+        public DateTime CreatedAt { get; }
+
+        public Player? LastEditedBy { get; }
+
+        public DateTime? LastEditedAt { get; }
+        public DateTime? ExpirationTime { get; }
+
+        public bool Deleted { get; }
+    }
+
     [Index(nameof(PlayerUserId))]
-    public class AdminNote
+    public class AdminNote : IAdminRemarksCommon
     {
         [Required, Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; }
 
@@ -910,7 +937,7 @@ namespace Content.Server.Database
     }
 
     [Index(nameof(PlayerUserId))]
-    public class AdminWatchlist
+    public class AdminWatchlist : IAdminRemarksCommon
     {
         [Required, Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; }
 
@@ -941,7 +968,7 @@ namespace Content.Server.Database
     }
 
     [Index(nameof(PlayerUserId))]
-    public class AdminMessage
+    public class AdminMessage : IAdminRemarksCommon
     {
         [Required, Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; }