fix(proxy): add validation and normalization for database proxy timeout

- Extract proxy timeout configuration logic into dedicated method
- Add min:1 validation rule for publicPortTimeout
- Normalize invalid timeout values (null, 0, negative) to default 3600s
- Add tests for timeout configuration normalization and validation

tests/Unit/ServiceIndexValidationTest.php

@@ -0,0 +1,11 @@
+<?php
+
+use App\Livewire\Project\Service\Index;
+
+test('service database proxy timeout requires a minimum of one second', function () {
+    $component = new Index;
+    $rules = (fn (): array => $this->rules)->call($component);
+
+    expect($rules['publicPortTimeout'])
+        ->toContain('min:1');
+});