Implement A3, A4, A5, B3: Add MarketOutcomePriceSnapshot, implement Polymarket CLOB prices-history endpoint, improve strategy classification, introduce CopytradingScore, and decouple/optimize scoring pipeline into a separate worker

src/Predictalytics.Infrastructure/Providers/Polymarket/PolymarketProvider.cs

@@ -295,4 +295,20 @@ public class PolymarketProvider : IPlatformProvider
 
         return TradeSide.Unknown;
     }
+
+    public async Task<IReadOnlyList<MarketOutcomePriceSnapshot>> GetPriceHistoryAsync(string tokenId, CancellationToken ct = default)
+    {
+        using var _ = PlatformLogContext.Push(PlatformName);
+        _logger.LogDebug("Fetching price history for CLOB Token {TokenId}", tokenId);
+        
+        var rawHistory = await _api.GetPricesHistoryAsync(tokenId, "6h", ct);
+        _logger.LogInformation("Fetched {Count} price history entries for {TokenId}", rawHistory.Count, tokenId);
+
+        return rawHistory.Select(r => new MarketOutcomePriceSnapshot
+        {
+            Price = (decimal)r.Price,
+            Timestamp = DateTimeOffset.FromUnixTimeSeconds(r.Timestamp).UtcDateTime,
+            MarketOutcomeId = 0
+        }).ToList();
+    }
 }