fix: populate webhook notification settings for existing teams

Add migration to create webhook notification settings records
for all existing teams. This fixes the "unauthorized" error when
accessing the webhook notifications page for teams that existed
before the webhook feature was added.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

database/migrations/2025_10_10_120001_populate_webhook_notification_settings_for_existing_teams.php

@@ -0,0 +1,46 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        $teams = DB::table('teams')->get();
+
+        foreach ($teams as $team) {
+            DB::table('webhook_notification_settings')->updateOrInsert(
+                ['team_id' => $team->id],
+                [
+                    'webhook_enabled' => false,
+                    'webhook_url' => null,
+                    'deployment_success_webhook_notifications' => false,
+                    'deployment_failure_webhook_notifications' => true,
+                    'status_change_webhook_notifications' => false,
+                    'backup_success_webhook_notifications' => false,
+                    'backup_failure_webhook_notifications' => true,
+                    'scheduled_task_success_webhook_notifications' => false,
+                    'scheduled_task_failure_webhook_notifications' => true,
+                    'docker_cleanup_success_webhook_notifications' => false,
+                    'docker_cleanup_failure_webhook_notifications' => true,
+                    'server_disk_usage_webhook_notifications' => true,
+                    'server_reachable_webhook_notifications' => false,
+                    'server_unreachable_webhook_notifications' => true,
+                ]
+            );
+        }
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // We don't need to do anything in down() since the webhook_notification_settings
+        // table will be dropped by the create migration's down() method
+    }
+};