Fixed bugs in member endpoints; Added merge-into member endpoint

app/Console/Commands/Correction/CorrectionPlaceholderMembersCommand.php

@@ -0,0 +1,59 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Console\Commands\Correction;
+
+use App\Enums\Role;
+use App\Models\Member;
+use App\Models\User;
+use Illuminate\Console\Command;
+use Illuminate\Database\Eloquent\Builder;
+
+class CorrectionPlaceholderMembersCommand extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'correction:placeholder-members '.
+        ' { --dry-run : Do not actually save anything to the database, just output what would happen }';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Sets all members who belong to a placeholder user to role placeholder';
+
+    /**
+     * Execute the console command.
+     */
+    public function handle(): int
+    {
+        $this->comment('Sets all members who belong to a placeholder user to role placeholder...');
+        $dryRun = (bool) $this->option('dry-run');
+        if ($dryRun) {
+            $this->comment('Running in dry-run mode. Nothing will be saved to the database.');
+        }
+
+        $members = Member::query()
+            ->where('role', '!=', Role::Placeholder->value)
+            ->whereHas('user', function (Builder $builder): void {
+                /** @var Builder<User> $builder */
+                $builder->where('is_placeholder', '=', true);
+            })
+            ->get();
+        foreach ($members as $member) {
+            /** @var Member $member */
+            $member->role = Role::Placeholder->value;
+            if (! $dryRun) {
+                $member->save();
+            }
+            $this->line('Set role of member (id='.$member->getKey().') to placeholder');
+        }
+
+        return self::SUCCESS;
+    }
+}