feat(budget): aylık bütçe motoru, limitler ve ay sonu tahmini

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

scripts/migrations/010-budgets.ts

@@ -0,0 +1,10 @@
+import { BudgetModel } from "@/models/budget";
+import type { Migration } from "./types";
+
+export const migration: Migration = {
+  name: "010-budgets",
+  description: "budgets index'i (hane × ay benzersiz)",
+  async up() {
+    await BudgetModel.createIndexes();
+  },
+};

scripts/migrations/index.ts

@@ -9,10 +9,11 @@ import { migration as m006 } from "./006-card-statements";
 import { migration as m007 } from "./007-contacts";
 import { migration as m008 } from "./008-in-kind";
 import { migration as m009 } from "./009-assets";
+import { migration as m010 } from "./010-budgets";
 import type { Migration } from "./types";
 
 /** Sıralı migration listesi. Yeni migration: dosyayı ekle ve buraya sırayla ekle. */
-export const MIGRATIONS: Migration[] = [m001, m002, m003, m004, m005, m006, m007, m008, m009];
+export const MIGRATIONS: Migration[] = [m001, m002, m003, m004, m005, m006, m007, m008, m009, m010];
 
 const COLLECTION = "migrations";