feat(in-kind): varlık türleri, fiyat tablosu, aynî borç/alacak, birikim planı ve ödeme akışı, 008 migration

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/migrations/008-in-kind.ts

@@ -0,0 +1,18 @@
+import { AssetPriceModel } from "@/models/asset-price";
+import { InKindDebtModel } from "@/models/in-kind-debt";
+import type { Migration } from "./types";
+
+export const migration: Migration = {
+  name: "008-in-kind",
+  description: "assetPrices ve inKindDebts index'leri; işlemlerde aynî borç alanları",
+  async up(db) {
+    await db
+      .collection("transactions")
+      .updateMany(
+        { inKindDebtId: { $exists: false } },
+        { $set: { inKindDebtId: null, inKindRole: null } },
+      );
+    await AssetPriceModel.createIndexes();
+    await InKindDebtModel.createIndexes();
+  },
+};