Add validators and services for Product Galleries and Product Tags

- Implemented Create, Delete, Get, and Update validators for Product Galleries.
- Added Create, Delete, Get, and Update validators for Product Tags.
- Created service classes for handling Discount Categories, Discount Orders, Discount Products, Discount Shopping Cart, Product Categories, Product Galleries, and Product Tags.
- Each service class integrates with CQRS for command and query handling.
- Established mapping profiles for Product Galleries.

src/CMSMicroservice.Infrastructure/Persistence/Migrations/20251202165758_RemoveParentIdFromUser.cs

@@ -0,0 +1,55 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CMSMicroservice.Infrastructure.Persistence.Migrations
+{
+    /// <inheritdoc />
+    public partial class RemoveParentIdFromUser : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Users_Users_ParentId",
+                schema: "CMS",
+                table: "Users");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Users_ParentId",
+                schema: "CMS",
+                table: "Users");
+
+            migrationBuilder.DropColumn(
+                name: "ParentId",
+                schema: "CMS",
+                table: "Users");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<long>(
+                name: "ParentId",
+                schema: "CMS",
+                table: "Users",
+                type: "bigint",
+                nullable: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Users_ParentId",
+                schema: "CMS",
+                table: "Users",
+                column: "ParentId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Users_Users_ParentId",
+                schema: "CMS",
+                table: "Users",
+                column: "ParentId",
+                principalSchema: "CMS",
+                principalTable: "Users",
+                principalColumn: "Id");
+        }
+    }
+}