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/InstituteStructure/Models/Department.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Containers\InstituteStructure\Models;
+
+use App\Containers\Education\Models\EducationalProgram;
+use App\Containers\User\Models\User;
+use App\Ship\Models\Model;
+use App\Ship\Traits\HasSeo;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+
+class Department extends Model
+{
+    use HasFactory, HasSeo;
+
+    protected $guarded = false;
+
+    protected $casts = [
+        'content' => 'array',
+    ];
+
+    public function faculty(): BelongsTo
+    {
+        return $this->belongsTo(Faculty::class);
+    }
+
+    public function workers(): BelongsToMany
+    {
+        return $this->belongsToMany(User::class, 'workers_departments')->withPivot(['position', 'sort', 'service_email', 'service_phone', 'cabinet']);
+    }
+
+    public function programs(): BelongsToMany
+    {
+        return $this->belongsToMany(EducationalProgram::class, 'program_department');
+    }
+
+    public function teachers(): BelongsToMany
+    {
+        return $this->belongsToMany(User::class, 'teachers_departments')->withPivot(['teaching_position', 'sort', 'service_email', 'service_phone', 'cabinet']);
+    }
+}