feat: add social_accounts table and provider tracking with verified-email linking

app/Models/SocialAccount.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class SocialAccount extends Model
+{
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var list<string>
+     */
+    protected $fillable = [
+        'user_id',
+        'provider',
+        'provider_id',
+    ];
+
+    /**
+     * Get the user that owns the social account.
+     */
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+}