performedOn($model) does not call the tapActivity() for the corresponding model

[FrancisMawn]

Describe the bug
Hi. I came across this issue while writing my tests. I'm not sure if that's intentional or not, but to me it seems like an oversight...? If you manually generate an activity and set its subject, the tapActivity() method on that subject model will not get called.

To Reproduce
Add a tapActivity() method on the user model.
Run the following code:

$user = User::factory()->create();
$activity = activity()->performedOn($user)->log('Some activity');

Expected behavior
I would expect the the tapActivity() handler to get called during the creation of the activity.

Versions (please complete the following information)

• PHP: 8.0
• Database: Mysql 8
• Laravel: 9.2
• Package: 4.4

[Gummibeer]

Feel free to provide a PR to improve that behavior.

[AlexVanderbist]

Thanks!