Eval API

curl "http://localhost:4360/api/eval/trajectory?agent=test-coverage&metric=composite" \
  -H "Authorization: Bearer $TOKEN"

{
  "agent": "test-coverage",
  "metric": "composite",
  "trajectory": [
    {"ts": "2026-03-22T21:30:00Z", "value": 0.1276},
    {"ts": "2026-03-22T21:35:00Z", "value": 0.1307},
    {"ts": "2026-03-22T21:40:00Z", "value": 0.1342}
  ]
}