build 050: switch MarketAnalysisService to canonical candles

app/src/trading/market_analysis/service.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 from enum import StrEnum
+from math import isfinite
 
 from src.core.numbers import safe_float
 from src.integrations.exchange.service import ExchangeService
@@ -240,7 +241,7 @@ class MarketAnalysisService:
         limit: int = 200,
     ) -> MarketAnalysisResult:
         try:
-            batch = ExchangeService().get_klines(
+            candles = ExchangeService().get_candles(
                 symbol=symbol,
                 interval=interval,
                 limit=limit,
@@ -253,18 +254,38 @@ class MarketAnalysisService:
                 htf_interval=self._htf_interval,
             )
 
-        candles = batch.candles
-        closes = [item.close_price for item in candles]
+        analysis_symbol = candles[0].symbol if candles else symbol
 
         if len(candles) < self._min_candles:
             return build_unknown_market_analysis_result(
-                symbol=batch.symbol,
+                symbol=analysis_symbol,
                 interval=interval,
                 reason="Недостаточно свечей для анализа рынка.",
                 candles_count=len(candles),
                 htf_interval=self._htf_interval,
             )
 
+        closes: list[float] = []
+
+        for candle in candles:
+            close_price_value = safe_float(candle.close_price)
+
+            if (
+                close_price_value is None
+                or not isfinite(close_price_value)
+            ):
+                return build_unknown_market_analysis_result(
+                    symbol=analysis_symbol,
+                    interval=interval,
+                    reason=(
+                        "Получены некорректные цены закрытия свечей."
+                    ),
+                    candles_count=len(candles),
+                    htf_interval=self._htf_interval,
+                )
+
+            closes.append(close_price_value)
+
         close_price = closes[-1] if closes else None
         ema_fast = ema(closes, self._fast_ema_period)
         ema_slow = ema(closes, self._slow_ema_period)
@@ -279,7 +300,7 @@ class MarketAnalysisService:
             or atr_value is None
         ):
             return build_unknown_market_analysis_result(
-                symbol=batch.symbol,
+                symbol=analysis_symbol,
                 interval=interval,
                 reason="Недостаточно данных для расчёта EMA / ATR.",
                 candles_count=len(candles),
@@ -303,7 +324,7 @@ class MarketAnalysisService:
 
         htf_context = build_htf_volatility_context(
             self,
-            symbol=batch.symbol,
+            symbol=analysis_symbol,
             base_interval=interval,
         )
 
@@ -483,7 +504,7 @@ class MarketAnalysisService:
             phase_window=self._phase_window,
         )
 
-        # Текущая свеча — последняя свеча из batch.
+        # Текущая свеча — последняя свеча из canonical candles.
         # Обычно это ещё формирующаяся свеча текущего 5m-интервала.
         current_interval_change_percent = self._candle_change_percent(
             candles,
@@ -563,7 +584,7 @@ class MarketAnalysisService:
 
         htf_trend_context = build_htf_trend_context(
             self,
-            symbol=batch.symbol,
+            symbol=analysis_symbol,
             base_interval=interval,
             local_state=state,
             local_trend=trend,
@@ -681,7 +702,7 @@ class MarketAnalysisService:
         )
 
         payload = build_market_analysis_payload(
-            symbol=batch.symbol,
+            symbol=analysis_symbol,
             interval=interval,
             state=state,
             trend=trend,
@@ -744,7 +765,7 @@ class MarketAnalysisService:
         )
 
         return build_market_analysis_result(
-            symbol=batch.symbol,
+            symbol=analysis_symbol,
             interval=interval,
             state=state,
             trend=trend,