🗃️ Add rewind point migration

DysonNetwork.Pass/Migrations/20251225145146_AddRewindPoint.cs

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+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore.Migrations;
+using NodaTime;
+
+#nullable disable
+
+namespace DysonNetwork.Pass.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddRewindPoint : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "rewind_points",
+                columns: table => new
+                {
+                    id = table.Column<Guid>(type: "uuid", nullable: false),
+                    year = table.Column<int>(type: "integer", nullable: false),
+                    schema_version = table.Column<int>(type: "integer", nullable: false),
+                    data = table.Column<Dictionary<string, object>>(type: "jsonb", nullable: false),
+                    account_id = table.Column<Guid>(type: "uuid", nullable: false),
+                    created_at = table.Column<Instant>(type: "timestamp with time zone", nullable: false),
+                    updated_at = table.Column<Instant>(type: "timestamp with time zone", nullable: false),
+                    deleted_at = table.Column<Instant>(type: "timestamp with time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk_rewind_points", x => x.id);
+                    table.ForeignKey(
+                        name: "fk_rewind_points_accounts_account_id",
+                        column: x => x.account_id,
+                        principalTable: "accounts",
+                        principalColumn: "id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "ix_rewind_points_account_id",
+                table: "rewind_points",
+                column: "account_id");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "rewind_points");
+        }
+    }
+}