Introduce custom fields in model findings inventory filtering

We've introduced a new filtering dialog on the Model Inventory, Validation Issues, and Artifacts pages that support custom fields and complex filter queries.

Features:

• Create complex filter queries with AND/OR logic and nested conditions
  
• Filter across all field types, including custom fields and attachments
  
• Remove individual filter components independently
  
• Visual grouping with parentheses for nested conditions
  
• Smart query restructuring that maintains valid filter states
  
• Improved performance with optimized field value lookups

New filter dialog

View and filter artifacts Working with the model inventory