many fixes and improvements - rework for modules/ and common/

feat(emailer): add Postmark and Resend providers

backend/Modules/Messaging/Migrations/20250609171331_Initial.cs

@@ -0,0 +1,45 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Hutopy.Modules.Messaging.Migrations
+{
+    /// <inheritdoc />
+    public partial class Initial : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.EnsureSchema(
+                name: "Messaging");
+
+            migrationBuilder.CreateTable(
+                name: "Messages",
+                schema: "Messaging",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    SubjectId = table.Column<Guid>(type: "uuid", nullable: false),
+                    ParentId = table.Column<Guid>(type: "uuid", nullable: true),
+                    Value = table.Column<string>(type: "character varying(2048)", maxLength: 2048, nullable: false),
+                    CreatedBy = table.Column<Guid>(type: "uuid", nullable: false),
+                    CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP"),
+                    DeletedBy = table.Column<Guid>(type: "uuid", nullable: true),
+                    DeletedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Messages", x => x.Id);
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Messages",
+                schema: "Messaging");
+        }
+    }
+}