fix positions

app/Database/Migrations/2026-09-03-000130_BackfillPostedAtForClosedFilledJobPositions.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Database\Migrations;
+
+use CodeIgniter\Database\Migration;
+
+class BackfillPostedAtForClosedFilledJobPositions extends Migration
+{
+    public function up()
+    {
+        if (!$this->db->tableExists('job_positions') || !$this->db->fieldExists('posted_at', 'job_positions')) {
+            return;
+        }
+
+        $this->db->table('job_positions')
+            ->whereIn('status', ['closed', 'filled'])
+            ->where('posted_at', null)
+            ->set('posted_at', 'COALESCE(created_at, updated_at)', false)
+            ->update();
+    }
+
+    public function down()
+    {
+        // Data-only fallback for legacy rows.
+    }
+}