Dimension signals

curl -X GET https://app.dacard.ai/api/score/scr_xyz/dimension/decision_quality/signals \
  -H "Authorization: Bearer $DACARD_API_KEY"

{
  "signals": [
    {
      "id": "sig_...",
      "type": "github.deploy_frequency",
      "provider": "github",
      "rawValue": 4.2,
      "normalizedValue": 0.84,
      "timestamp": "2026-04-29T08:00:00Z",
      "evidenceUrl": "https://github.com/acme/repo/actions/runs/..."
    }
  ]
}