add refund and event logic

app/Http/Requests/Finance/FeeRefundRequest.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Http\Requests\Finance;
+
+use App\Http\Requests\ApiFormRequest;
+
+class FeeRefundRequest extends ApiFormRequest
+{
+    public function authorize(): bool
+    {
+        return $this->user() !== null;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'parent_id' => ['required', 'integer', 'min:1'],
+            'students' => ['required', 'array'],
+            'students.*.student_id' => ['nullable', 'integer'],
+            'students.*.class_section_id' => ['required', 'integer', 'min:1'],
+            'students.*.enrollment_status' => ['required', 'string', 'max:50'],
+            'students.*.admission_status' => ['required', 'string', 'max:50'],
+            'students.*.withdrawal_date' => ['nullable', 'date'],
+        ];
+    }
+}