TRI-04 | Thread Age Decay Scorer

[Manish281005]

Task: TRI-04 | Thread Age Decay Scorer

Estimated Hours: 1h | Owner: MK | Priority: P0 | Status: Completed

Definition:
Third axis of five-axis triage. Calculates how long a conversation thread has been active and applies exponential decay. Older threads = lower urgency. Returns score 0.0–1.0.

Acceptance Criteria:

• Accepts thread creation date
• Formula: score = 1.0 - (days_old / 30)^2, clipped to [0, 1]
• Thread < 1 day old → score > 0.98
• Thread > 30 days old → score near 0.0
• Returns {axis: "decay", raw_score: float, explanation: str}