Add analytics tracking to measure usage of the layer type filter feature.

Implementation Details:

• Add LAYER_TYPE_FILTER_APPLIED event constant
• Track when users apply the layer type filter
• Include filter value in event properties (BASE_IMAGE | APPLICATION)
• Use useAnalytics hook for event tracking
• Follow existing analytics patterns from other filter events

Event Details:

• Event Name: 'Layer Type Filter Applied'
• When It Fires: User selects the layer type filter in the Vulnerabilities tab
• Properties: {{ { filter: 'BASE_IMAGE' | 'APPLICATION' }

  }}

Acceptance Criteria:

• Event fires when filter is applied (not on page load)
• Includes correct filter value in properties
• Event is properly tracked in Amplitude
• Follows naming conventions from other analytics events