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>

src/models/asset-price.ts

@@ -0,0 +1,29 @@
+import { model, models, Schema, type InferSchemaType, type Model } from "mongoose";
+import { ASSET_KEYS } from "@/shared/assets";
+
+/**
+ * Fiyat tablosu (Bölüm 6.6): varlık × tarih × alış/satış (birim başına kuruş). İlk aşamada elle
+ * giriş; otomatik kaynaklar Faz 17'de `source` ile eklenir. Gün başına tek kayıt (yeniden girişte
+ * güncellenir).
+ */
+const assetPriceSchema = new Schema(
+  {
+    householdId: { type: Schema.Types.ObjectId, required: true },
+    assetKey: { type: String, enum: ASSET_KEYS, required: true },
+    /** "YYYY-MM-DD" (İstanbul). */
+    date: { type: String, required: true },
+    buyMinor: { type: Number, required: true, min: 0 },
+    sellMinor: { type: Number, required: true, min: 0 },
+    source: { type: String, enum: ["manual"], default: "manual" },
+    createdBy: { type: Schema.Types.ObjectId, required: true },
+  },
+  { timestamps: true, collection: "assetPrices" },
+);
+
+assetPriceSchema.index({ householdId: 1, assetKey: 1, date: -1 }, { unique: true });
+
+export type AssetPrice = InferSchemaType<typeof assetPriceSchema>;
+
+export const AssetPriceModel: Model<AssetPrice> =
+  (models.AssetPrice as Model<AssetPrice> | undefined) ??
+  model<AssetPrice>("AssetPrice", assetPriceSchema);