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        "lane_id": "energy_transmission",
        "reason": "outside_observation_window"
      },
      {
        "evidence_id": "evd:sensor.fixture.market.001",
        "record_sha256": "4b620a15f2aa2c0bafe5ffd907b233fa14d5c061529d3adb7ae408759428a962",
        "source_id": "sensor_fixture_market",
        "lane_id": "market_transmission",
        "reason": "outside_observation_window"
      },
      {
        "evidence_id": "evd:sensor.fixture.news.001",
        "record_sha256": "54d6cbda07b02c8135e34c5efbb160a73a9ddb42ddbb6db168961385b7ff7bec",
        "source_id": "sensor_fixture_news",
        "lane_id": "news",
        "reason": "outside_observation_window"
      },
      {
        "evidence_id": "evd:sensor.fixture.physical.001",
        "record_sha256": "21a500169e53fb688f55235155e32c28fde6d4cc7a01105fc1336ce9547ff50c",
        "source_id": "sensor_fixture_physical",
        "lane_id": "physical_transmission",
        "reason": "outside_observation_window"
      },
      {
        "evidence_id": "evd:sensor.fixture.attention.001",
        "record_sha256": "b7fed9998a9da3c9d11cfa17e044925b6eb35e4699b6a3b27a30bbf1e2722fe4",
        "source_id": "sensor_fixture_attention",
        "lane_id": "public_attention",
        "reason": "outside_observation_window"
      },
      {
        "evidence_id": "evd:sensor.fixture.trade.001",
        "record_sha256": "9b1d86e46dffc33e60e861bb7cf46fe9e7c88e3acd7d6b5d58e05f609be2e78f",
        "source_id": "sensor_fixture_trade",
        "lane_id": "trade_transmission",
        "reason": "outside_observation_window"
      }
    ],
    "counts": {
      "registered_lanes": 8,
      "present_lanes": 1,
      "absent_lanes": 7,
      "event_evidence_links": 8,
      "eligible_observations": 1,
      "excluded_observations": 7
    },
    "coverage": {
      "denominator": "eight_registered_semantic_lanes",
      "observed_lane_ids": [
        "official"
      ],
      "missing_lane_ids": [
        "news",
        "coded_event",
        "physical_transmission",
        "trade_transmission",
        "energy_transmission",
        "market_transmission",
        "public_attention"
      ],
      "fraction": 0.125
    },
    "result": {
      "status": "matrix_partial",
      "semantic_join": "collation_only",
      "numeric_fusion_performed": false
    },
    "limitations": [
      "absence_means_no_eligible_link_in_release_not_no_real_world_signal",
      "canonical_release_generation_is_not_external_availability_proof",
      "event_status_not_ground_truth",
      "lane_coverage_not_event_coverage",
      "no_causal_attribution",
      "no_cross_lane_numeric_fusion",
      "no_forecast_or_probability",
      "no_source_content_or_observed_values_rendered",
      "semantic_collation_not_sensor_agreement"
    ]
  }
}