Track Rule Violation Lifecycle and Fix Dynamics

[akhundMurad]

Pacta currently reports the presence of rule violations at a given snapshot but does not track how violations evolve over time.

This issue introduces violation lifecycle tracking to better understand rule effectiveness and architectural debt behavior.

Proposed metrics

• Mean Time To Fix (MTTF) for violations
• Percentage of violations older than N days
• Detection of re-introduced (regressed) violations

A violation should be identifiable across snapshots to allow age and lifecycle tracking.

Example insight

35% of rule violations are older than 90 days, suggesting that architectural rules are being consistently ignored or deferred.

Acceptance Criteria

• Violations are uniquely identifiable across snapshots
• Violation age and lifecycle state (new, existing, resolved, regressed) are tracked
• MTTF can be computed for resolved violations
• Age-based violation statistics can be queried
• Metrics are exposed via existing reporting outputs
• Lifecycle behavior is documented