added migration seeders models and test script

app/Models/AiProviderModel.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Models;
+
+use CodeIgniter\Model;
+
+class AiProviderModel extends Model
+{
+    protected $table = 'ai_providers';
+    protected $primaryKey = 'id';
+    protected $useAutoIncrement = false;
+    protected $returnType = 'array';
+    protected $useSoftDeletes = false;
+    protected $allowedFields = [
+        'id',
+        'name',
+        'display_name',
+        'base_url',
+        'is_builtin',
+        'created_at',
+    ];
+
+    protected $useTimestamps = true;
+    protected $createdField = 'created_at';
+    protected $updatedField = null;
+
+    protected $validationRules = [
+        'name' => 'required|max_length[100]|is_unique[ai_providers.name]',
+        'display_name' => 'required|max_length[255]',
+    ];
+
+    // Get builtin providers only
+    public function getBuiltinProviders()
+    {
+        return $this->where('is_builtin', true)
+                    ->orderBy('name', 'ASC')
+                    ->get()
+                    ->getResultArray();
+    }
+
+    // Get custom providers only
+    public function getCustomProviders()
+    {
+        return $this->where('is_builtin', false)
+                    ->orderBy('name', 'ASC')
+                    ->get()
+                    ->getResultArray();
+    }
+
+    // Get provider by name
+    public function getByName($name)
+    {
+        return $this->where('name', $name)
+                    ->get()
+                    ->getRowArray();
+    }
+}