add controllers, servoices

app/Services/Reimbursements/ReimbursementLookupService.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Services\Reimbursements;
+
+use App\Models\Reimbursement;
+
+class ReimbursementLookupService
+{
+    public function findReimbursementIdForExpense(int $expenseId): ?int
+    {
+        if ($expenseId <= 0) {
+            return null;
+        }
+
+        $row = Reimbursement::query()
+            ->select('id')
+            ->where('expense_id', $expenseId)
+            ->orderByDesc('id')
+            ->first();
+
+        return $row ? (int) $row->id : null;
+    }
+}