add blueprint files to git

app/Models/Registration.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Registration extends Model
+{
+    use HasFactory;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array
+     */
+    protected $fillable = [
+        'event_id',
+        'participant_id',
+        'active',
+    ];
+
+    /**
+     * The attributes that should be cast to native types.
+     *
+     * @var array
+     */
+    protected $casts = [
+        'id' => 'integer',
+        'event_id' => 'integer',
+        'participant_id' => 'integer',
+        'active' => 'boolean',
+    ];
+
+    public function event(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(Event::class);
+    }
+
+    public function participant(): \Illuminate\Database\Eloquent\Relations\BelongsTo
+    {
+        return $this->belongsTo(Participant::class);
+    }
+}