backend: align API/models with current PostgreSQL schema

app/Models/UserBlock.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+
+class UserBlock extends Model
+{
+    use HasFactory;
+
+    public $timestamps = false;
+
+    protected $table = 'user_blocks';
+
+    protected $fillable = [
+        'user_id',
+        'level',
+        'reason',
+        'blocked_until',
+        'created_by',
+        'created_by_user_id',
+        'trigger_venue_id',
+        'is_active',
+        'created_at',
+    ];
+
+    protected $casts = [
+        'blocked_until' => 'datetime',
+        'is_active' => 'boolean',
+    ];
+}