feat(home-dialog): add HomeDialogEntry entity + migration

DDL-only per migrations-are-ddl-only convention. Seeded by
SVSim.Bootstrap MyPageGlobalsImporter (T5) — no HasData.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.Database/Migrations/20260608225037_AddHomeDialogEntries.cs

@@ -0,0 +1,51 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SVSim.Database.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddHomeDialogEntries : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "HomeDialogEntries",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "integer", nullable: false),
+                    TitleTextId = table.Column<string>(type: "text", nullable: false),
+                    Image = table.Column<string>(type: "text", nullable: false),
+                    ButtonListJson = table.Column<string>(type: "jsonb", nullable: false),
+                    BeginTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    EndTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    Type = table.Column<int>(type: "integer", nullable: true),
+                    Priority = table.Column<int>(type: "integer", nullable: false),
+                    DateCreated = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    DateUpdated = table.Column<DateTime>(type: "timestamp with time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_HomeDialogEntries", x => x.Id);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_HomeDialogEntries_BeginTime_EndTime",
+                table: "HomeDialogEntries",
+                columns: new[] { "BeginTime", "EndTime" });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_HomeDialogEntries_BeginTime_EndTime",
+                table: "HomeDialogEntries");
+
+            migrationBuilder.DropTable(
+                name: "HomeDialogEntries");
+        }
+    }
+}