{
  "title": "Synthetic spatial ETL: validation, replay and recovery",
  "disclosure": "Educational reconstruction using invented records on a local Cartesian grid. No client data, Earth coordinates, or production performance claims.",
  "metrics": [
    {
      "label": "Synthetic input rows",
      "value": "12"
    },
    {
      "label": "Accepted initial rows",
      "value": "4"
    },
    {
      "label": "Quarantined input rows",
      "value": "8"
    },
    {
      "label": "Records after recovery",
      "value": "5"
    },
    {
      "label": "Rollback state check",
      "value": "Passed"
    }
  ],
  "tables": [
    {
      "heading": "Committed batch results",
      "headers": [
        "Batch",
        "Inserted",
        "Updated",
        "Unchanged",
        "Stale skipped"
      ],
      "rows": [
        [
          "Initial load",
          4,
          0,
          0,
          0
        ],
        [
          "Identical replay",
          0,
          0,
          4,
          0
        ],
        [
          "Recovery retry",
          1,
          2,
          0,
          0
        ],
        [
          "Recovered replay",
          0,
          0,
          3,
          0
        ],
        [
          "Older source replay",
          0,
          0,
          2,
          2
        ]
      ]
    },
    {
      "heading": "Quarantine review",
      "headers": [
        "Input row",
        "Synthetic ID",
        "Reason"
      ],
      "rows": [
        [
          5,
          "SYN-005",
          "crs must be LOCAL:DEMO_CARTESIAN"
        ],
        [
          6,
          "SYN-006",
          "x must be a finite number in [0, 10000] metres"
        ],
        [
          7,
          "SYN-007",
          "schema mismatch: missing=['condition'], extra=[]"
        ],
        [
          8,
          "SYN-008",
          "inspected_at contains an invalid calendar date or time"
        ],
        [
          9,
          "SYN-009",
          "revision must be a positive SQLite-sized integer"
        ],
        [
          10,
          "SYN-010",
          "y must be a finite number in [0, 10000] metres"
        ],
        [
          11,
          "SYN-011",
          "duplicate id in batch; all occurrences quarantined"
        ],
        [
          12,
          "SYN-011",
          "duplicate id in batch; all occurrences quarantined"
        ]
      ]
    },
    {
      "heading": "Recovered database state",
      "headers": [
        "Synthetic ID",
        "X (m)",
        "Y (m)",
        "Condition",
        "Revision"
      ],
      "rows": [
        [
          "SYN-001",
          1000.0,
          1200.0,
          "attention",
          2
        ],
        [
          "SYN-002",
          1820.0,
          1400.0,
          "clear",
          2
        ],
        [
          "SYN-003",
          4500.0,
          2100.0,
          "attention",
          1
        ],
        [
          "SYN-004",
          7900.0,
          8300.0,
          "clear",
          1
        ],
        [
          "SYN-012",
          5000.0,
          5100.0,
          "attention",
          1
        ]
      ]
    }
  ],
  "notes": [
    "CRS is LOCAL:DEMO_CARTESIAN: arbitrary origin, x right/east, y up/north, metres, valid extent 0 to 10000 on each axis. It has no Earth reference and cannot be overlaid on a real map.",
    "A deliberate failure after two updates left every stored value identical to the pre-load snapshot. A subsequent retry committed two updates and one insertion.",
    "Repeated batches perform no writes when payload and revision match. Older revisions are skipped. Conflicting equal revisions or reversed inspection dates abort the complete transaction.",
    "Quarantine retains each rejected input and its reason. Both occurrences of a duplicated ID are rejected; source ordering never chooses a winner.",
    "SQLite is used for a portable transaction demonstration, not presented as PostGIS, a spatial index, a production job scheduler, or a performance benchmark."
  ],
  "checks": {
    "rollback_verified": true,
    "identical_replay_verified": true,
    "recovered_replay_verified": true
  },
  "quarantine": [
    {
      "row": 5,
      "id": "SYN-005",
      "reason": "crs must be LOCAL:DEMO_CARTESIAN",
      "record": {
        "id": "SYN-005",
        "crs": "UNKNOWN",
        "x": 1000,
        "y": 1200,
        "condition": "clear",
        "inspected_at": "2026-01-01T09:00:00Z",
        "revision": 1
      }
    },
    {
      "row": 6,
      "id": "SYN-006",
      "reason": "x must be a finite number in [0, 10000] metres",
      "record": {
        "id": "SYN-006",
        "crs": "LOCAL:DEMO_CARTESIAN",
        "x": -1,
        "y": 1200,
        "condition": "clear",
        "inspected_at": "2026-01-01T09:00:00Z",
        "revision": 1
      }
    },
    {
      "row": 7,
      "id": "SYN-007",
      "reason": "schema mismatch: missing=['condition'], extra=[]",
      "record": {
        "id": "SYN-007",
        "crs": "LOCAL:DEMO_CARTESIAN",
        "x": 1000,
        "y": 1200,
        "inspected_at": "2026-01-01T09:00:00Z",
        "revision": 1
      }
    },
    {
      "row": 8,
      "id": "SYN-008",
      "reason": "inspected_at contains an invalid calendar date or time",
      "record": {
        "id": "SYN-008",
        "crs": "LOCAL:DEMO_CARTESIAN",
        "x": 1000,
        "y": 1200,
        "condition": "clear",
        "inspected_at": "2026-02-30T09:00:00Z",
        "revision": 1
      }
    },
    {
      "row": 9,
      "id": "SYN-009",
      "reason": "revision must be a positive SQLite-sized integer",
      "record": {
        "id": "SYN-009",
        "crs": "LOCAL:DEMO_CARTESIAN",
        "x": 1000,
        "y": 1200,
        "condition": "clear",
        "inspected_at": "2026-01-01T09:00:00Z",
        "revision": true
      }
    },
    {
      "row": 10,
      "id": "SYN-010",
      "reason": "y must be a finite number in [0, 10000] metres",
      "record": {
        "id": "SYN-010",
        "crs": "LOCAL:DEMO_CARTESIAN",
        "x": 1000,
        "y": "not-a-number",
        "condition": "clear",
        "inspected_at": "2026-01-01T09:00:00Z",
        "revision": 1
      }
    },
    {
      "row": 11,
      "id": "SYN-011",
      "reason": "duplicate id in batch; all occurrences quarantined",
      "record": {
        "id": "SYN-011",
        "crs": "LOCAL:DEMO_CARTESIAN",
        "x": 1000,
        "y": 1200,
        "condition": "clear",
        "inspected_at": "2026-01-01T09:00:00Z",
        "revision": 1
      }
    },
    {
      "row": 12,
      "id": "SYN-011",
      "reason": "duplicate id in batch; all occurrences quarantined",
      "record": {
        "id": "SYN-011",
        "crs": "LOCAL:DEMO_CARTESIAN",
        "x": 2000,
        "y": 2200,
        "condition": "attention",
        "inspected_at": "2026-01-01T09:00:00Z",
        "revision": 1
      }
    }
  ]
}