Fix non-deterministic activity log order for same-second events

[AltinEtemaj]

Bug Report

Description

The order timeline in the admin panel displays activity log entries in a non-deterministic order when multiple events occur within the same second. This causes entries like "order updated" to appear before "order created", which is confusing and incorrect.

Root Cause

In ActivityLogFeed.php, activities are sorted by created_at:

$activities = $this->subject->activities()
    ->orderBy('created_at', 'desc')
    ->with(['causer', 'subject'])
    ->paginate(10, ['*'], $this->pageName);

When an order is placed, multiple activity log entries are created within the same request cycle (order created, order updated, order line created, payment capture, etc.). These all share the exact same created_at timestamp, so the database returns them in an undefined order.

Steps to Reproduce

1. Place an order through the storefront
2. Open the order in the admin panel
3. Observe the timeline — "order updated" may appear before "order created"

Fix

Replace orderBy('created_at', 'desc') with orderBy('id', 'desc'). The auto-incrementing id column preserves the true insertion order, even when multiple events share the same timestamp.

- ->orderBy('created_at', 'desc')
+ ->orderBy('id', 'desc')