[3-LEG] Severe convection and hail chain, one convective region (?entity=tornado...

{ "discoverable": true, "example": { "entity": "tornado-alley-core" }, "exampleRequest": "/gauge/severe-convection-region?entity=tornado-alley-core", "method": "GET", "queryParams": { "entity": "required — 監測對象 id;★與 signal_id 成對,配對清單見免費 /gauge/catalog 的 signals[].entities[]" }, "type": "http" }

{ "additionalProperties": true, "properties": { "_citation": { "description": "離線可驗證引用:{statement_type, not_advice:bool, claim, fact, source, record_hash, signature(Ed25519), key_id, issuer_DID(did:key), verify_url}。零信任自驗的信任根", "type": [ "object", "null" ] }, "cross_line_narrative": { "description": "跨線對照敘述(純描述,不判斷不預測)", "type": "string" }, "data_timespans": { "description": "各腿的觀測時間與距今時數", "items": { "additionalProperties": true, "type": "object" }, "type": "array" }, "decision_points": { "description": "{count, points:[{tag,current,swappable,how}], note}。可換標籤重跑的決策點(換一個標籤=一次呼叫);不換用原語境為預設、不額外收費", "type": [ "object", "null" ] }, "entity": { "description": "本包的對象鍵(即呼叫時給的 ?entity=)", "type": "string" }, "grade": { "description": "資料分級誠實揭露(如 \"screening-level, not decision-grade\")", "type": [ "string", "null" ] }, "legs": { "description": "★核心交付:各腿讀數,鍵=腿名(如 drought/heat/crop-vhi),值含 signal_id/current/observed_at/data_age_hours/record_hash 等", "type": "object" }, "name": { "description": "對象人類可讀名", "type": [ "string", "null" ] }, "nature": { "description": "中立聲明:GAUGE 只提供觀測與走勢描述,不判斷、不預測、不建議", "type": "string" }, "note": { "description": "(條件性)端點特定誠實揭露(邊界/粒度/免責);部分端點不回", "type": "string" }, "provenance": { "description": "資料血緣:{served_from, data_as_of, oldest_leg_as_of, data_age_hours(凍結齡,參考), age_hours_now(request-time 現算齡=freshness 的真依據), freshness(fresh|recent|stale), freshness_basis(該筆用的 cadence 與門檻,字串), dead_source(選配:源頭凍結/停產), data_lineage:[{signal,traceable_to,uncertainty,record_hash,...}], validation_status}。freshness 為 cadence-aware(月/季/年頻官方線不以 24h 誤判);同一判準與免費 /gauge/coverage 共用。買家可溯源到官方源", "type": [ "object", "null" ] }, "scope": { "description": "範圍與邊界誠實聲明(監測非預報、情報非指揮、可驗證保證的邊界)", "type": [ "string", "null" ] } }, "required": [ "nature", "legs" ], "type": "object" }