Feature: Add Regression Bug Tracking

[TomHacker69]

Description

Regression bugs require special attention because they indicate previously working functionality has broken.

Proposed Solution

Support marking bugs as regressions and tracking them separately.

Suggested Changes

• Regression flag
• Previous working version
• Regression dashboard
• Regression filters
• Severity boost
• Analytics

Expected Outcome

Regression issues become easier to identify and prioritize.

Suggested Labels

• enhancement
• analytics
• workflow