Add unit and feature tests for ticket processing and article management

- Implement Fake repositories and services for testing purposes.
- Create tests for Article API including creation, validation, and listing.
- Develop ProcessTicketJobFlowTest to validate ticket processing logic.
- Add QuickReplyAdminTest for creating and updating quick replies.
- Implement TicketAndArticleModelTest to ensure proper cascading deletes and credential encryption.
- Create TicketIngestionTest for ticket creation and job dispatching.
- Add TicketShowPageTest to verify rendering of quick replies and tool calls.
- Implement unit tests for ClassifierPromptBuilder, EmbeddingService, LlmJsonDecoder, QuickReplyResolver, SupportReplyService, TicketResultPayloadBuilder, TicketToolCallService, and ToolCallRequestValidator.

tests/Feature/TicketAndArticleModelTest.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Article;
+use App\Models\QuickReply;
+use App\Models\Ticket;
+use App\Models\TicketToolCall;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\DB;
+use Tests\TestCase;
+
+class TicketAndArticleModelTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_article_quick_reply_pivot_and_cascade_delete(): void
+    {
+        $article = Article::query()->create(['title' => 'DNS', 'content' => 'x']);
+        $reply = QuickReply::query()->create(['title' => 'Quick', 'content' => 'y', 'is_active' => true]);
+
+        $article->quickReplies()->sync([$reply->id]);
+        $this->assertCount(1, $article->quickReplies);
+
+        $article->delete();
+
+        $pivotCount = DB::table('article_quick_reply')->count();
+        $this->assertSame(0, $pivotCount);
+    }
+
+    public function test_ticket_credentials_are_stored_encrypted_and_decrypted_via_cast(): void
+    {
+        $ticket = Ticket::query()->create([
+            'message' => 'vraag',
+            'api_credentials' => ['apiuser' => 'demo', 'apipassword' => 'secret'],
+        ]);
+
+        $this->assertSame('demo', $ticket->api_credentials['apiuser']);
+        $raw = DB::table('tickets')->where('id', $ticket->id)->value('api_credentials');
+        $this->assertIsString($raw);
+        $this->assertStringNotContainsString('secret', $raw);
+    }
+
+    public function test_ticket_tool_call_casts_arrays(): void
+    {
+        $ticket = Ticket::query()->create(['message' => 'vraag']);
+        $article = Article::query()->create(['title' => 'DNS', 'content' => 'x']);
+
+        $toolCall = TicketToolCall::query()->create([
+            'ticket_id' => $ticket->id,
+            'article_id' => $article->id,
+            'action' => 'domain_inf',
+            'status' => 'success',
+            'parameters' => ['sld' => 'example', 'tld' => 'nl'],
+            'response' => ['ok' => true],
+        ]);
+
+        $toolCall->refresh();
+        $this->assertSame('example', $toolCall->parameters['sld']);
+        $this->assertTrue($toolCall->response['ok']);
+    }
+}