feat(defter): harcama kayıtları — ekle, düzenle, sil, geri al (backend)

- /periods/{id}/entries (from/to filtresi), /entries/{id}, /entries/{id}/restore
- Grup kategoriden türetilir; kategori/ödeme türü hane ve aktiflik kontrolü
- Yalnızca açık dönem; soft delete + geri al; sürüm çakışmasında 409
- 6 entegrasyon testi (izolasyon, kapalı dönem, doğrulama, önceki dönem önerisi)

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

frontend/src/types/Entry.ts

@@ -0,0 +1,8 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { Group } from "./Group";
+
+export type Entry = { id: string, period_id: string, date: string, 
+/**
+ * Kuruş
+ */
+amount: number, group: Group, category_id: string, payment_method_id: string | null, description: string | null, created_by: string, version: number, };

frontend/src/types/EntryCreateRequest.ts

@@ -0,0 +1,15 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+export type EntryCreateRequest = { 
+/**
+ * `"YYYY-MM-DD"`, dönem içinde
+ */
+date: string, 
+/**
+ * Kuruş, > 0
+ */
+amount: number, 
+/**
+ * Grup kategoriden alınır
+ */
+category_id: string, payment_method_id?: string, description?: string, };

frontend/src/types/EntryUpdateRequest.ts

@@ -0,0 +1,11 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+export type EntryUpdateRequest = { date?: string, amount?: number, category_id?: string, 
+/**
+ * Boş metin → ödeme türünü kaldır
+ */
+payment_method_id?: string, 
+/**
+ * Boş metin → açıklamayı kaldır
+ */
+description?: string, version?: number, };