lots of progress

app/Models/SslCertificate.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class SslCertificate extends Model
+{
+    const UPDATED_AT = null;
+
+    protected $fillable = [
+        'site_id',
+        'issuer',
+        'expires_at',
+        'checked_at',
+    ];
+
+    protected $casts = [
+        'expires_at' => 'datetime',
+        'checked_at' => 'datetime',
+    ];
+
+    public function site(): BelongsTo
+    {
+        return $this->belongsTo(Site::class);
+    }
+}