Migrate backend to Porto architecture and fix minor bugs

- Fully transitioned the backend to the Porto architectural pattern
- Improved code organization and maintainability
- Fixed minor bugs and inconsistencies

app/Containers/Education/Models/AdmissionPlan.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Containers\Education\Models;
+
+use App\Ship\Models\Model;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class AdmissionPlan extends Model
+{
+    use HasFactory;
+
+    protected $guarded = false;
+
+    protected $casts = [
+        'exams' => 'array',
+        'contests' => 'array'
+    ];
+
+    public function educationalProgram(): BelongsTo
+    {
+        return $this->belongsTo(EducationalProgram::class, 'educational_programs_id', 'id');
+    }
+
+    public function admissionCampaign(): BelongsTo
+    {
+        return $this->belongsTo(AdmissionCampaign::class, 'admission_campaigns_id', 'id');
+    }
+}