fix positions

app/Database/Migrations/2026-09-01-000100_CreateJobPostings.php

@@ -62,6 +62,7 @@ class CreateJobPostings extends Migration
                 'requirements' => ['type' => 'TEXT', 'null' => true],
                 'status' => ['type' => 'VARCHAR', 'constraint' => 20, 'default' => 'draft'],
                 'posted_by' => ['type' => 'INT', 'constraint' => 11, 'unsigned' => true, 'null' => true],
+                'posted_at' => ['type' => 'DATETIME', 'null' => true],
                 'created_at' => ['type' => 'DATETIME', 'null' => true],
                 'updated_at' => ['type' => 'DATETIME', 'null' => true],
             ]);

app/Database/Migrations/2026-09-03-000120_AddPostedAtToJobPositions.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Database\Migrations;
+
+use CodeIgniter\Database\Migration;
+
+class AddPostedAtToJobPositions extends Migration
+{
+    public function up()
+    {
+        if (!$this->db->tableExists('job_positions')) {
+            return;
+        }
+
+        if (!$this->db->fieldExists('posted_at', 'job_positions')) {
+            $this->forge->addColumn('job_positions', [
+                'posted_at' => [
+                    'type' => 'DATETIME',
+                    'null' => true,
+                    'after' => 'posted_by',
+                ],
+            ]);
+        }
+
+        $this->db->table('job_positions')
+            ->whereIn('status', ['open', 'closed', 'filled'])
+            ->where('posted_at', null)
+            ->set('posted_at', 'COALESCE(created_at, updated_at)', false)
+            ->update();
+    }
+
+    public function down()
+    {
+        if ($this->db->tableExists('job_positions') && $this->db->fieldExists('posted_at', 'job_positions')) {
+            $this->forge->dropColumn('job_positions', 'posted_at');
+        }
+    }
+}

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.
+    }
+}