feat: using database lock to protect bot api token

Preventing multiple threads from updating the bot's oauth token using a
database level lock. It's a bit of a hack since ef core doesn't support
pessmistic locking out-of-the-box. This work around works between the
running application and dbeaver.

Author: ProgrammingByPermutation

src/Nullinside.Api.Model/Ddl/User.cs

@@ -1,3 +1,5 @@
+using System.ComponentModel.DataAnnotations;
+
 using Microsoft.EntityFrameworkCore;
 
 namespace Nullinside.Api.Model.Ddl;
@@ -60,6 +62,7 @@ public class User : ITableModel {
   /// <summary>
   ///   The last timestamp of when the user logged into the site.
   /// </summary>
+  [Timestamp]
   public DateTime UpdatedOn { get; set; }
 
   /// <summary>
@@ -92,6 +95,8 @@ public void OnModelCreating(ModelBuilder modelBuilder) {
         .HasMaxLength(255);
       entity.Property(e => e.Token)
         .HasMaxLength(255);
+      entity.Property(e => e.UpdatedOn)
+        .IsRowVersion();
       // TODO: Add the other strings in this file with lengths
     });
   }

src/Nullinside.Api.Model/Migrations/20250228164901_UserTableTimestamp.Designer.cs

@@ -0,0 +1,40 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using MySql.EntityFrameworkCore.Metadata;
+
+#nullable disable
+
+namespace Nullinside.Api.Model.Migrations
+{
+    /// <inheritdoc />
+    public partial class UserTableTimestamp : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<DateTime>(
+                name: "UpdatedOn",
+                table: "Users",
+                type: "datetime(6)",
+                rowVersion: true,
+                nullable: false,
+                oldClrType: typeof(DateTime),
+                oldType: "datetime(6)")
+                .Annotation("MySQL:ValueGenerationStrategy", MySQLValueGenerationStrategy.ComputedColumn);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AlterColumn<DateTime>(
+                name: "UpdatedOn",
+                table: "Users",
+                type: "datetime(6)",
+                nullable: false,
+                oldClrType: typeof(DateTime),
+                oldType: "datetime(6)",
+                oldRowVersion: true)
+                .OldAnnotation("MySQL:ValueGenerationStrategy", MySQLValueGenerationStrategy.ComputedColumn);
+        }
+    }
+}

src/Nullinside.Api.Model/Migrations/20250228164901_UserTableTimestamp.cs

@@ -16,7 +16,7 @@ protected override void BuildModel(ModelBuilder modelBuilder)
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "8.0.8")
+                .HasAnnotation("ProductVersion", "8.0.11")
                 .HasAnnotation("Relational:MaxIdentifierLength", 64);
 
             modelBuilder.Entity("Nullinside.Api.Model.Ddl.DockerDeployments", b =>
@@ -247,6 +247,8 @@ protected override void BuildModel(ModelBuilder modelBuilder)
                         .HasColumnType("longtext");
 
                     b.Property<DateTime>("UpdatedOn")
+                        .IsConcurrencyToken()
+                        .ValueGeneratedOnAddOrUpdate()
                         .HasColumnType("datetime(6)");
 
                     b.HasKey("Id");