feat(fundamentals): multi-ticker DB caching, parallel html scraper, and frontend mappings

FinlyticCore/Dtos/Fundamentals/AssetHeaderDto.cs

@@ -1,4 +1,4 @@
-using System.Text.Json.Serialization;
+using System.Text.Json.Serialization;
 
 namespace FinlyticCore.Dtos.Fundamentals;
 
@@ -18,7 +18,7 @@ public record AssetHeaderDto
     public string Description { get; init; } = string.Empty;
 
     [JsonPropertyName("primaryTicker")]
-    public TickerInfoDto PrimaryTicker { get; init; }
+    public TickerInfoDto PrimaryTicker { get; init; } = new();
 
     [JsonPropertyName("availableTickers")]
     public List<TickerInfoDto> AvailableTickers { get; init; } = [];

FinlyticCore/Dtos/Fundamentals/CorporateEventDto.cs

@@ -16,7 +16,7 @@ public record CorporateEventDto
     public string? Isin { get; init; }
 
     [JsonPropertyName("ticker")]
-    public TickerInfoDto Ticker { get; init; }
+    public TickerInfoDto Ticker { get; init; } = new();
 
     [JsonPropertyName("companyName")]
     public string? CompanyName { get; init; }

FinlyticCore/Dtos/Fundamentals/FundamentalDataDto.cs

@@ -9,7 +9,7 @@ namespace FinlyticCore.Dtos.Fundamentals;
 public record FundamentalDataDto
 {
     [JsonPropertyName("ticker")]
-    public TickerInfoDto Ticker { get; init; }
+    public TickerInfoDto Ticker { get; init; } = new();
 
     // --- Valuation & Multiples ---
     [JsonPropertyName("marketCap")]