Fix Estimator scoring and PnL engine cashflow

src/Predictalytics.Infrastructure/Migrations/20260707161145_AddTraderPositionHistoryGuards.cs

@@ -0,0 +1,43 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Predictalytics.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddTraderPositionHistoryGuards : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "IsHistoryPruned",
+                table: "TraderPositions",
+                type: "tinyint(1)",
+                nullable: false,
+                defaultValue: false);
+
+            migrationBuilder.AddColumn<DateTime>(
+                name: "LastTradeExecutedAt",
+                table: "TraderPositions",
+                type: "datetime(6)",
+                nullable: true);
+
+            // Step 2.1: Global Reset to force re-calculation of all positions and fix corrupted PnL data
+            migrationBuilder.Sql("UPDATE TraderPositions SET LastAppliedTradeId = 0;");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "IsHistoryPruned",
+                table: "TraderPositions");
+
+            migrationBuilder.DropColumn(
+                name: "LastTradeExecutedAt",
+                table: "TraderPositions");
+        }
+    }
+}

src/Predictalytics.Infrastructure/Migrations/20260707161722_AddTraderDailySnapshots.cs

@@ -0,0 +1,52 @@
+using System;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Predictalytics.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddTraderDailySnapshots : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "TraderDailySnapshots",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn),
+                    TraderId = table.Column<int>(type: "int", nullable: false),
+                    Date = table.Column<DateTime>(type: "datetime(6)", nullable: false),
+                    TotalPnl = table.Column<decimal>(type: "decimal(18,4)", precision: 18, scale: 4, nullable: false),
+                    CurrentBalance = table.Column<decimal>(type: "decimal(18,4)", precision: 18, scale: 4, nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_TraderDailySnapshots", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_TraderDailySnapshots_Traders_TraderId",
+                        column: x => x.TraderId,
+                        principalTable: "Traders",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                })
+                .Annotation("MySql:CharSet", "utf8mb4");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_TraderDailySnapshots_TraderId_Date",
+                table: "TraderDailySnapshots",
+                columns: new[] { "TraderId", "Date" },
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "TraderDailySnapshots");
+        }
+    }
+}

src/Predictalytics.Infrastructure/Migrations/AppDbContextModelSnapshot.cs

@@ -718,6 +718,36 @@ namespace Predictalytics.Infrastructure.Migrations
                     b.ToTable("TraderCategoryPerformances");
                 });
 
+            modelBuilder.Entity("Predictalytics.Domain.Entities.TraderDailySnapshot", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    MySqlPropertyBuilderExtensions.UseMySqlIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<decimal>("CurrentBalance")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("datetime(6)");
+
+                    b.Property<decimal>("TotalPnl")
+                        .HasPrecision(18, 4)
+                        .HasColumnType("decimal(18,4)");
+
+                    b.Property<int>("TraderId")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("TraderId", "Date")
+                        .IsUnique();
+
+                    b.ToTable("TraderDailySnapshots");
+                });
+
             modelBuilder.Entity("Predictalytics.Domain.Entities.TraderPosition", b =>
                 {
                     b.Property<int>("Id")
@@ -730,9 +760,15 @@ namespace Predictalytics.Infrastructure.Migrations
                         .HasPrecision(10, 6)
                         .HasColumnType("decimal(10,6)");
 
+                    b.Property<bool>("IsHistoryPruned")
+                        .HasColumnType("tinyint(1)");
+
                     b.Property<long>("LastAppliedTradeId")
                         .HasColumnType("bigint");
 
+                    b.Property<DateTime?>("LastTradeExecutedAt")
+                        .HasColumnType("datetime(6)");
+
                     b.Property<DateTime>("LastUpdatedAt")
                         .HasColumnType("datetime(6)");
 
@@ -970,6 +1006,17 @@ namespace Predictalytics.Infrastructure.Migrations
                     b.Navigation("Trader");
                 });
 
+            modelBuilder.Entity("Predictalytics.Domain.Entities.TraderDailySnapshot", b =>
+                {
+                    b.HasOne("Predictalytics.Domain.Entities.Trader", "Trader")
+                        .WithMany()
+                        .HasForeignKey("TraderId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Trader");
+                });
+
             modelBuilder.Entity("Predictalytics.Domain.Entities.TraderPosition", b =>
                 {
                     b.HasOne("Predictalytics.Domain.Entities.MarketOutcome", "MarketOutcome")