Audit FilterSet definitions application-wide

[jeremystretch]

Proposed Changes

Review all currently defined FilterSet classes and check for:

• Missing filters
• Inconsistent names or behavior
• Suboptimal performance
• Opportunities for code reduction

Justification

The FilterSet classes defined in NetBox have evolved organically over the past several years and we are overdue for a structured audit of the existing filter sets. This will help us identify inconsistent or suboptimal implementations, and may yield additional work to help standardize and shrink the code base.