curl --request GET \
  --url https://api.usezombie.com/v1/agents/{agent_id}/improvement-report \
  --header 'Authorization: Bearer <token>'

{
  "agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "trust_level": "<string>",
  "improvement_stalled_warning": true,
  "proposals_generated": 123,
  "proposals_approved": 123,
  "proposals_vetoed": 123,
  "proposals_rejected": 123,
  "proposals_applied": 123,
  "avg_score_delta_per_applied_change": 123,
  "current_tier": "<string>",
  "baseline_tier": "<string>",
  "request_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}