{
  "schema": "pg36-ch16-release-proposal-v1",
  "release": "1.4-proposal",
  "fixture": "ch16-spatiotemporal-v1",
  "target": {
    "database": "pg36_shop",
    "data_schema": "shop_ch16",
    "extension_schema": "shop_ch16_ext",
    "owner": "pg36_owner",
    "application_role": "pg36_app",
    "postgresql": "14-18",
    "validated_on": "18.4",
    "btree_gist": "1.8",
    "postgis": "3.6.4",
    "pigsty_reference": "4.4",
    "pigsty_l1_validation": "not-run"
  },
  "decision": {
    "event_time": "occurred_at",
    "ingest_time": "received_at",
    "valid_time": "valid_during",
    "partition_key": "occurred_at",
    "partition_timezone": "UTC",
    "partition_bounds": "[)",
    "partition_strategy": "native PostgreSQL daily RANGE partitions",
    "timeseries_extension": "deferred until compression, retention, continuous aggregation, or operational evidence justifies it",
    "canonical_srid": 4326,
    "geometry_role": "topological predicates and spatial indexing",
    "geography_role": "meter-based distance predicates",
    "geofence_boundary_policy": "ST_Covers includes boundary",
    "geofence_version_policy": "non-overlapping tstzrange per zone enforced by btree_gist exclusion"
  },
  "contracts": {
    "ingest_attempts": 13,
    "distinct_events": 12,
    "duplicate_registry": "e003:2",
    "geofence_versions": 4,
    "hubs": 3,
    "partition_counts": {
      "2026-03-07": 1,
      "2026-03-08": 7,
      "2026-03-09": 4
    },
    "zone_memberships": 14,
    "central_day8_events": "e002,e003,e005,e006,e008",
    "late_events": "e001,e004",
    "dst_probe_elapsed_seconds": 600,
    "mixed_srid_sqlstate": "XX000",
    "overlapping_validity_sqlstate": "23P01",
    "application_write_sqlstate": "42501",
    "managed_indexes": 13
  },
  "expected_state": {
    "business_checksum": "53f51cef1f0bed1a5c2fc89bfad109f4"
  },
  "evidence": [
    "manifest.txt",
    "attempts.csv",
    "geofences.csv",
    "hubs.csv",
    "temporal-analysis.csv",
    "partition-catalog.csv",
    "time-buckets.csv",
    "zone-membership.csv",
    "boundary-semantics.csv",
    "distance-semantics.csv",
    "extension-catalog.csv",
    "index-catalog.csv",
    "security-catalog.csv",
    "size-catalog.csv",
    "time-pruned-plan.txt",
    "time-wrapped-plan.txt",
    "spatial-gist-plan.txt",
    "spatial-spgist-plan.txt",
    "joint-plan.txt",
    "app-query.csv",
    "srid-mismatch.stderr",
    "overlap-geofence.stderr",
    "app-write.stderr",
    "final-state.csv",
    "verify.txt"
  ],
  "rollback": {
    "token": "RESET_CH16_SPATIOTEMPORAL_LAB",
    "target": "pg36_shop/shop_ch16+shop_ch16_ext",
    "requires_no_active_workers": true,
    "requires_full_state_verification": true,
    "uses_cascade": false,
    "transactional": true,
    "preserves_ch14_extensions": true
  },
  "limitations": [
    "The tiny fixture cannot establish throughput, latency, memory, WAL, storage, vacuum, or replica-lag targets.",
    "Forced plans establish that an access path is available; they do not prove planner preference or superiority.",
    "EPSG:4326 geometry distances are angular degrees and are not a substitute for meter-based geography or a reviewed projected CRS.",
    "A three-day daily partition layout does not establish the correct production granularity or retention policy.",
    "PostGIS backup and upgrade behavior must be validated in the target Pigsty environment on every L1 node.",
    "TimescaleDB is not installed or benchmarked by this release candidate."
  ]
}