feat(market): Phase 1 扩展 — 更多 symbol + Bollinger/Vegas + 衍生品信号

- collector.symbols 与 supportedSymbols 加 SOL/BNB/DOGE，env-default 与 README 同步
- entity 追加 TechnicalStructure.Intervals（每周期 Bollinger + Vegas，omitempty 不破坏既有字段）与 DerivativesBundle.Signal
- 新增纯解析 usecase derivatives_signal.go：fundingBias 绝对阈值、oiSignal 用 P20 baseline + 价格方向（OI up + 价格 up/down → long/short_building，funding 不参与方向）、lsrRegime 绝对阈值；signal 数据不足走 warnings 进 DataQuality
- indicator.go 加 sma/stddev/ema/bollinger/vegas + computeIntervalTechnicals；IndicatorComputer 签名收 klines map
- harness 同步：G12 扩入 derivatives_signal.go（含 Makefile G12.5/6 + ADR-0002 适用范围 + project-map / harness-health 更新）

internal/usecase/market_context.go

@@ -14,8 +14,11 @@ import (
 )
 
 var supportedSymbols = map[string]bool{
-	"BTCUSDT": true,
-	"ETHUSDT": true,
+	"BTCUSDT":  true,
+	"ETHUSDT":  true,
+	"SOLUSDT":  true,
+	"BNBUSDT":  true,
+	"DOGEUSDT": true,
 }
 
 var supportedIntervals = []string{"15m", "1h", "4h", "1d", "1w"}
@@ -39,7 +42,8 @@ type MarketContextUsecase struct {
 	oiRepo      OpenInterestRepository
 	lsRepo      LongShortRatioRepository
 
-	indicator IndicatorComputer
+	indicator    IndicatorComputer
+	derivSignal  DerivativesSignalComputer
 
 	log *slog.Logger
 }
@@ -52,6 +56,7 @@ func NewMarketContextUsecase(
 	oiRepo OpenInterestRepository,
 	lsRepo LongShortRatioRepository,
 	indicator IndicatorComputer,
+	derivSignal DerivativesSignalComputer,
 	log *slog.Logger,
 ) *MarketContextUsecase {
 	return &MarketContextUsecase{
@@ -62,6 +67,7 @@ func NewMarketContextUsecase(
 		oiRepo:      oiRepo,
 		lsRepo:      lsRepo,
 		indicator:   indicator,
+		derivSignal: derivSignal,
 		log:         log,
 	}
 }
@@ -167,27 +173,36 @@ func (u *MarketContextUsecase) Build(ctx context.Context, symbol string) (*entit
 		addWarn("top trader position long/short query failed: " + err.Error())
 	}
 
+	derivBundle := entity.DerivativesBundle{
+		Funding: entity.FundingBundle{
+			Current: currentFund,
+			History: fundingHist,
+		},
+		OpenInterest: entity.OpenInterestBundle{
+			Current: currentOI,
+			History: oiHist,
+		},
+		LongShortRatio: entity.LongShortBundle{
+			Global:            globalLS,
+			TopTraderPosition: topLS,
+		},
+		TakerBuySellVolume: nil,
+	}
+	if u.derivSignal != nil {
+		signal, sigWarnings := u.derivSignal.Compute(currentFund, oiHist, globalLS, klines[derivativePeriod])
+		derivBundle.Signal = signal
+		for _, w := range sigWarnings {
+			addWarn(w)
+		}
+	}
+
 	out := &entity.MarketContext{
 		Symbol:      symbol,
 		GeneratedAt: time.Now().UnixMilli(),
 		Snapshot:    snapshot,
 		Klines:      klines,
-		Derivatives: entity.DerivativesBundle{
-			Funding: entity.FundingBundle{
-				Current: currentFund,
-				History: fundingHist,
-			},
-			OpenInterest: entity.OpenInterestBundle{
-				Current: currentOI,
-				History: oiHist,
-			},
-			LongShortRatio: entity.LongShortBundle{
-				Global:            globalLS,
-				TopTraderPosition: topLS,
-			},
-			TakerBuySellVolume: nil,
-		},
-		Technical: u.indicator.Compute(klines[derivativePeriod], globalLS),
+		Derivatives: derivBundle,
+		Technical:   u.indicator.Compute(klines, derivativePeriod, globalLS),
 		DataQuality: entity.DataQuality{
 			Source:   "binance",
 			Warnings: warnings,