fix logic and tests, update docker CI file

app/Models/Student.php

@@ -4,12 +4,14 @@ namespace App\Models;
 
 use Illuminate\Database\Eloquent\Builder;
 use App\Models\BaseModel;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Support\Facades\DB;
 
 class Student extends BaseModel
 {
+    use HasFactory;
     protected $table = 'students';
 
     /**
@@ -38,7 +40,7 @@ class Student extends BaseModel
     ];
 
     protected $casts = [
-        'school_id'          => 'integer',
+        'school_id'          => 'string',
         'age'                => 'integer',
         'photo_consent'      => 'boolean',
         'is_new'             => 'boolean',
@@ -392,4 +394,4 @@ class Student extends BaseModel
             'is_active'           => ['nullable', 'boolean'],
         ];
     }
-}
+}