GET /auth/provider_keys

curl -X GET https://api.app.shinzo.ai/auth/provider_keys \
  -H "Authorization: Bearer <jwt_token>"

{
  "keys": [
    {
      "uuid": "pk_abc123def456",
      "provider": "anthropic",
      "label": "Production Key",
      "status": "active",
      "created_at": "2025-01-15T10:00:00Z",
      "updated_at": "2025-01-15T10:00:00Z"
    },
    {
      "uuid": "pk_xyz789uvw012",
      "provider": "anthropic",
      "label": "Development Key",
      "status": "active",
      "created_at": "2025-01-10T08:00:00Z",
      "updated_at": "2025-01-18T14:30:00Z"
    }
  ]
}