feat: fase 2 backend — crowd types, persons, sections, shifts, invite flow

- Crowd Types + Persons CRUD (73 tests)
- Festival Sections + Time Slots + Shifts CRUD met assign/claim flow (84 tests)
- Invite Flow + Member Management met InvitationService (109 tests)
- Schema v1.6 migraties volledig uitgevoerd
- DevSeeder bijgewerkt met crowd types voor testorganisatie

api/app/Models/Person.php

@@ -0,0 +1,91 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Concerns\HasUlids;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+final class Person extends Model
+{
+    use HasFactory;
+    use HasUlids;
+    use SoftDeletes;
+
+    protected $table = 'persons';
+
+    protected $fillable = [
+        'user_id',
+        'event_id',
+        'crowd_type_id',
+        'company_id',
+        'name',
+        'email',
+        'phone',
+        'status',
+        'is_blacklisted',
+        'admin_notes',
+        'custom_fields',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'is_blacklisted' => 'boolean',
+            'custom_fields' => 'array',
+        ];
+    }
+
+    public function event(): BelongsTo
+    {
+        return $this->belongsTo(Event::class);
+    }
+
+    public function crowdType(): BelongsTo
+    {
+        return $this->belongsTo(CrowdType::class);
+    }
+
+    public function company(): BelongsTo
+    {
+        return $this->belongsTo(Company::class);
+    }
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function crowdLists(): BelongsToMany
+    {
+        return $this->belongsToMany(CrowdList::class, 'crowd_list_persons')
+            ->withPivot('added_at', 'added_by_user_id');
+    }
+
+    public function shiftAssignments(): HasMany
+    {
+        return $this->hasMany(ShiftAssignment::class);
+    }
+
+    public function scopeApproved(Builder $query): Builder
+    {
+        return $query->where('status', 'approved');
+    }
+
+    public function scopePending(Builder $query): Builder
+    {
+        return $query->where('status', 'pending');
+    }
+
+    public function scopeForCrowdType(Builder $query, string $type): Builder
+    {
+        return $query->whereHas('crowdType', fn (Builder $q) => $q->where('system_type', $type));
+    }
+}