Add Bollinger Bands Volatility Protection indicator support

- Introduced BollingerBandsVolatilityProtection indicator in GeneticService with configuration settings for period and standard deviation (stdev).
- Updated ScenarioHelpers to handle creation and validation of the new indicator type.
- Enhanced CustomScenario, backtest, and scenario pages to include BollingerBandsVolatilityProtection in indicator lists and parameter mappings.
- Modified API and types to reflect the addition of the new indicator in relevant enums and mappings.
- Updated frontend components to support new parameters and visualization for Bollinger Bands.

src/Managing.Domain/Shared/Helpers/TradingBox.cs

@@ -37,7 +37,7 @@ public class IndicatorComboConfig
     /// <summary>
     /// Minimum confidence level to return a signal (default: Low)
     /// </summary>
-    public Confidence MinimumConfidence { get; set; } = Confidence.Low;
+    public Confidence MinimumConfidence { get; set; } = Confidence.Medium;
 
     /// <summary>
     /// Minimum confidence level required from context strategies (default: Medium)