feat(assets): update scanner background service, derivative entities, and dynamic settings

FinlyticAssets/Entities/AssetEntity.cs

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+namespace FinlyticAssets.Entities;
+
+public abstract class AssetEntity
+{
+    public string Isin { get; set; } = string.Empty; 
+    public string Name { get; set; } = string.Empty;
+    public string Type { get; set; } = string.Empty;
+    public string InstrumentCategory { get; set; } = string.Empty;
+    public bool HasCfd { get; set; }
+    public string? ImageId { get; set; }
+
+    public DateTime LastUpdatedAt { get; set; } = DateTime.UtcNow;
+
+    public List<TagEntity> Tags { get; set; } = new();
+}

FinlyticAssets/Entities/BondEntity.cs

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+using FinlyticAssets.Entities;
+
+namespace FinlyticAssets.Entities;
+
+public class BondEntity : AssetEntity
+{
+    public string BondIssuerName { get; set; } = string.Empty;
+    public string SearchSubtitle { get; set; } = string.Empty;
+}

FinlyticAssets/Entities/CryptoEntity.cs

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+namespace FinlyticAssets.Entities;
+
+public class CryptoEntity : AssetEntity
+{
+    public string Subtitle { get; set; } = string.Empty;
+    public string SearchSubtitle { get; set; } = string.Empty;
+}

FinlyticAssets/Entities/DerivativeEntity.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace FinlyticAssets.Entities;
+
+public enum OptionType
+{
+    Long,
+    Short
+}
+
+public class DerivativeEntity : AssetEntity
+{
+    // --- Verknüpfung zum Basiswert (Underlying) ---
+    [StringLength(12, MinimumLength = 12)]
+    public string? UnderlyingIsin { get; set; }
+
+    // --- Derivat-Spezifikationen ---
+    public OptionType OptionType { get; set; } // Long / Short
+
+    [MaxLength(100)]
+    public string ProductCategoryName { get; set; } = string.Empty; // Z.B. "Best Turbo"
+
+    [MaxLength(100)]
+    public string NextGenProductCategoryName { get; set; } = string.Empty; // Z.B. "Turbo"
+
+    // --- Kennzahlen (Präzise decimals für Finanzwerte) ---
+    [Column(TypeName = "numeric(18,6)")]
+    public decimal Strike { get; set; } // Basispreis
+
+    [Column(TypeName = "numeric(18,6)")]
+    public decimal Barrier { get; set; } // Knock-Out-Schwelle
+
+    [Column(TypeName = "numeric(10,4)")]
+    public decimal Leverage { get; set; } // Hebel (z. B. 1.01)
+
+    public decimal? Size { get; set; }
+
+    public decimal? Factor { get; set; }
+
+    public decimal? Delta { get; set; }
+
+    [MaxLength(10)]
+    public string Currency { get; set; } = "EUR";
+
+    public DateTime? Expiry { get; set; } // Verfallsdatum (null bei Open-End / Best Turbo)
+
+    // --- Emittent (Issuer) Daten ---
+    [MaxLength(150)]
+    public string Issuer { get; set; } = string.Empty; // Z.B. "Société Générale"
+
+    [MaxLength(150)]
+    public string IssuerDisplayName { get; set; } = string.Empty;
+
+    public string? IssuerImageId { get; set; }
+
+    // PostgreSQL Mapped Array für TR-Kategorien
+    public List<string> DerivativeProductCategories { get; set; } = new();
+}

FinlyticAssets/Entities/EtfEntity.cs

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+namespace FinlyticAssets.Entities;
+
+public class EtfEntity : AssetEntity
+{
+    public List<string> DerivativeProductCategories { get; set; } = new();
+    public string EtfDescription { get; set; } = string.Empty;
+    public string MappedEtfIndexName { get; set; } = string.Empty;
+    public string Subtitle { get; set; } = string.Empty;
+    public string SearchSubtitle { get; set; } = string.Empty;
+}

FinlyticAssets/Entities/StockEntity.cs

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+namespace FinlyticAssets.Entities;
+
+public class StockEntity : AssetEntity
+{
+    public List<string> DerivativeProductCategories { get; set; } = new();
+}

FinlyticAssets/Entities/SyntheticEntity.cs

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+namespace FinlyticAssets.Entities;
+
+public class SyntheticEntity : AssetEntity
+{
+    public List<string> DerivativeProductCategories { get; set; } = new();
+}

FinlyticAssets/Entities/TagEntity.cs

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+namespace FinlyticAssets.Entities;
+
+public class TagEntity
+{
+    public string Id { get; set; } = string.Empty; 
+    public string Name { get; set; } = string.Empty;
+    public string Type { get; set; } = string.Empty;
+
+    public List<AssetEntity> Assets { get; set; } = new();
+}