feat(AppVersion): Add version tracking system for frontend cache invalidation

- Add AppVersion entity with CurrentVersion, MinRequiredVersion, RequiresFullCacheClear
- Add GetAppVersion query to check app version and compare with client version
- Add GetAllAppVersions query for admin panel
- Add UpdateAppVersion command to update/create app versions
- Add appversion.proto for gRPC communication
- Add AppVersionService for gRPC endpoints
- Add database migration for AppVersions table

src/CMSMicroservice.Infrastructure/Persistence/Migrations/20251225143501_AddAppVersionsTable.cs

@@ -0,0 +1,48 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CMSMicroservice.Infrastructure.Persistence.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddAppVersionsTable : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "AppVersions",
+                schema: "CMS",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    AppName = table.Column<string>(type: "nvarchar(max)", nullable: false),
+                    CurrentVersion = table.Column<string>(type: "nvarchar(max)", nullable: false),
+                    MinRequiredVersion = table.Column<string>(type: "nvarchar(max)", nullable: false),
+                    RequiresFullCacheClear = table.Column<bool>(type: "bit", nullable: false),
+                    UpdateMessage = table.Column<string>(type: "nvarchar(max)", nullable: true),
+                    ReleaseNotes = table.Column<string>(type: "nvarchar(max)", nullable: true),
+                    IsActive = table.Column<bool>(type: "bit", nullable: false),
+                    Created = table.Column<DateTime>(type: "datetime2", nullable: false),
+                    CreatedBy = table.Column<string>(type: "nvarchar(max)", nullable: true),
+                    LastModified = table.Column<DateTime>(type: "datetime2", nullable: true),
+                    LastModifiedBy = table.Column<string>(type: "nvarchar(max)", nullable: true),
+                    IsDeleted = table.Column<bool>(type: "bit", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_AppVersions", x => x.Id);
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "AppVersions",
+                schema: "CMS");
+        }
+    }
+}

src/CMSMicroservice.Infrastructure/Persistence/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -451,6 +451,58 @@ namespace CMSMicroservice.Infrastructure.Persistence.Migrations
                     b.ToTable("WorkerExecutionLogs", "CMS");
                 });
 
+            modelBuilder.Entity("CMSMicroservice.Domain.Entities.Configuration.AppVersion", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("AppName")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<DateTime>("Created")
+                        .HasColumnType("datetime2");
+
+                    b.Property<string>("CreatedBy")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("CurrentVersion")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<bool>("IsActive")
+                        .HasColumnType("bit");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("bit");
+
+                    b.Property<DateTime?>("LastModified")
+                        .HasColumnType("datetime2");
+
+                    b.Property<string>("LastModifiedBy")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("MinRequiredVersion")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ReleaseNotes")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<bool>("RequiresFullCacheClear")
+                        .HasColumnType("bit");
+
+                    b.Property<string>("UpdateMessage")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("AppVersions", "CMS");
+                });
+
             modelBuilder.Entity("CMSMicroservice.Domain.Entities.Configuration.SystemConfiguration", b =>
                 {
                     b.Property<long>("Id")