Feature: campaigns:stats — campaign performance metrics

[nifinet]

Problem

Agents can't monitor campaign performance. No open rate, reply rate, bounce rate, or positive reply data available via CLI.

Proposal

overloop campaigns:stats <campaign_id>
# Output:
# {
#   "prospects_enrolled": 150,
#   "emails_sent": 120,
#   "emails_opened": 42,
#   "open_rate": 0.35,
#   "replies": 5,
#   "reply_rate": 0.042,
#   "positive_replies": 1,
#   "bounces": 3,
#   "unsubscribes": 0
# }

This enables agents to:

• Pause underperforming campaigns
• Compare A/B variants
• Scale up performing campaigns
• Report results to users