Noise score: Classify alerts as actionable vs. noise with confidence

[nomadicmehul]

Summary

Add a noise scoring system where the agent classifies each incoming alert as actionable (needs investigation) vs. noise (can be suppressed or auto-resolved), with a confidence score.

Why This Matters

Not every alert needs investigation. Flapping alerts, known transient issues, and informational alerts waste agent time. A noise classifier reduces unnecessary investigation cycles.

Acceptance Criteria

• Score each alert 0.0 (pure noise) to 1.0 (definitely actionable)
• Factors: alert frequency, auto-resolve history, severity, affected service criticality, user-impact correlation
• Configurable threshold (default: 0.5) — below threshold = auto-suppress
• Log suppressed alerts for audit trail
• Metrics: "X alerts received, Y investigated, Z suppressed as noise"
• Feed suppression decisions back into incident memory for learning