fix: map CoinGlass heatmap range bounds

internal/repo/webapi/coinglass/mapper.go

@@ -26,7 +26,7 @@ type CGEnvelope struct {
 // 真实响应的 plaintext 是 data 本体（例如 {"instrument":...,"liq":[...]}）。
 // 为兼容早期 fixture，如 plaintext 仍带 success/code/data envelope，则先拆 data。
 // PR-1 阶段做最薄映射：data 整体进 RawGrid；
-// 若顶层有 minPrice/maxPrice/priceMin/priceMax 字段则抽出（容忍命名漂移）。
+// 若顶层有 rangeLow/rangeHigh/minPrice/maxPrice/priceMin/priceMax 字段则抽出（容忍命名漂移）。
 // 真实 schema 经 spike dump 后回填到 spec §5（mapper 同步加显式字段）。
 //
 // 数值边界（ADR-0004 D3）：解 JSON number 默认 float64 是 transient，
@@ -45,8 +45,8 @@ func MapLiqHeatMap(symbol string, interval string, ts int64, plaintext []byte) (
 
 	var probe map[string]json.RawMessage
 	if err := json.Unmarshal(raw, &probe); err == nil {
-		out.PriceMin = pickFloatField(probe, "priceMin", "minPrice", "min")
-		out.PriceMax = pickFloatField(probe, "priceMax", "maxPrice", "max")
+		out.PriceMin = pickFloatField(probe, "priceMin", "rangeLow", "minPrice", "min")
+		out.PriceMax = pickFloatField(probe, "priceMax", "rangeHigh", "maxPrice", "max")
 	}
 	return out, nil
 }

internal/repo/webapi/coinglass/mapper_test.go

@@ -20,7 +20,7 @@ func TestMapLiqHeatMap_FloatToString(t *testing.T) {
 	}{
 		{
 			name:        "real decrypted data object",
-			plaintext:   `{"instrument":{"exName":"Binance","instrumentId":"BTCUSDT"},"liq":[[1,2,3.4]],"priceMin":110234.5,"priceMax":118888.0}`,
+			plaintext:   `{"instrument":{"exName":"Binance","instrumentId":"BTCUSDT"},"liq":[[1,2,3.4]],"prices":[110000,111000],"rangeLow":110234.5,"rangeHigh":118888.0,"updateTime":1779717600600,"y":[]}`,
 			wantSymbol:  "Binance_BTCUSDT",
 			wantMin:     "110234.5",
 			wantMax:     "118888",