[Refactor] Refactoring Usage of Dynamic Values in HasDraft Trait

[kinkaz]

This pull request aims to refactor usages in the HasDraft trait, specifically addressing instances where column names for soft delete and timestamps were not utilizing dynamic values. Previously, static values such as CREATED_AT, UPDATED_AT, and DELETED_AT were hardcoded, leading to potential issues.

class Page extends Model
{
    use SoftDeletes;
    use HasDrafts;

    const CREATED_AT = 'created'; // not taken into account
    const UPDATED_AT = 'modified'; // not taken into account
    const DELETED_AT = 'deleted'; // not taken into account
}

Changes made :

• Modified strings and properties utilizing the dynamic values (updated_at, modified_at, deleted_at) provided by their respective model methods. This change enhances flexibility and adherence to best practices within Laravel.

Additional Notes :

• No breaking changes are introduced by this refactoring and all tests are passing.

[oddvalue]

Thanks