fix: use registerCallback in HasUuids and HasUlids traits

[binaryfire]

Problem

The HasUuids and HasUlids traits define a public function creating() instance method to hook into the model's creating event. This prevents models from defining their own creating() method using Hyperf's instance method pattern:

class User extends Model
{
    use HasUuids;

    // ❌ PHP Fatal Error: trait method collision
    public function creating(Creating $event): void
    {
        $this->api_key = Str::random(32);
    }
}

This also causes conflicts when multiple traits try to define the same event method.

Solution

Replace the instance method with registerCallback() in a boot method:

public static function bootHasUuids(): void
{
    static::registerCallback('creating', function (self $model): void {
        // ...
    });
}

This allows:

• Models to define their own creating() instance methods
• Multiple traits to hook into the same event without collision
• Consistent pattern with other Hypervel traits (Searchable, BroadcastsEvents, HasNode, etc.)

Changes

• HasUuids: Replace creating() with bootHasUuids() using registerCallback
• HasUlids: Replace creating() with bootHasUlids() using registerCallback