chore: initial Laravel 13 project setup for eCert MBIP

- Laravel 13.9 + PHP 8.5 + MySQL
- Bootstrap 5.3 + jQuery 3.7 + Chart.js (replacing Alpine/Tailwind)
- Packages: intervention/image, dompdf, simple-qrcode, league/csv, laravel/breeze, laravel/boost
- 17 database migrations: users, programs, qr_codes, participants, attendances, certificates, questionnaires, email_logs, audit_logs
- 13 Eloquent models with full relationships
- Admin layout (Bootstrap 5 sidebar) + public layout (mobile-first)
- Rate limiters: checkin (60/min), certificate (30/min)
- Admin seeder: admin@mbip.gov.my
- Storage directories + symlink configured

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Models/Participant.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Support\Str;
+
+class Participant extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'uuid', 'name', 'no_kp', 'email', 'phone', 'agency', 'participant_type',
+    ];
+
+    protected static function boot(): void
+    {
+        parent::boot();
+        static::creating(fn($model) => $model->uuid ??= (string) Str::uuid());
+    }
+
+    public function programs()
+    {
+        return $this->belongsToMany(Program::class, 'program_participants')
+                    ->withPivot(['registration_source', 'is_pre_registered', 'pre_registered_session', 'status', 'registered_at'])
+                    ->withTimestamps();
+    }
+
+    public function programParticipants()
+    {
+        return $this->hasMany(ProgramParticipant::class);
+    }
+
+    public function attendances()
+    {
+        return $this->hasMany(Attendance::class);
+    }
+
+    public function certificates()
+    {
+        return $this->hasMany(Certificate::class);
+    }
+
+    public function questionnaireResponses()
+    {
+        return $this->hasMany(QuestionnaireResponse::class);
+    }
+
+    public function attendanceForProgram(int $programId): ?Attendance
+    {
+        return $this->attendances()->where('program_id', $programId)->first();
+    }
+
+    public function hasAnsweredQuestionnaire(int $programId, int $questionnaireSetId): bool
+    {
+        return $this->questionnaireResponses()
+                    ->where('program_id', $programId)
+                    ->where('questionnaire_set_id', $questionnaireSetId)
+                    ->exists();
+    }
+}