Fixes creating invalid query with null values

[marcusmoore]

Description

This PR adds a guard against adding a null value to the query and subsequently throwing an exception upon the execution of that query.

Having a custom field with a null db_column can cause this error since $request->filled(null) is truthy.

Type of change

• Bug fix (non-breaking change which fixes an issue)

[shortcut-integration]

This pull request has been linked to Shortcut Story #24398: Illuminate\Database\QueryException: SQLSTATE[42S22]: Column not found: 1054 Unknown column '' in 'where clause' (SQL: select count(*) as aggregate from assets inner join status_labels as status_alias on status_alias.id = assets.status_id and.

[what-the-diff]

PR Summary

• Enhanced Search Functionality in AssetsController
  This update adds an additional verification step in the AssetsController. This means the system will now verify if there is identifiable information before applying any search filters. This improved logic ensures more relevant search results and prevents potential errors or inconsistencies.