feat(wbs-ux): implement real-world CRUD templates and refactor QuantDataGrid to AG Grid

src/dotnet/QuantEngine.Web/Endpoints/BulkInsertMarketExcelEndpoint.cs

@@ -0,0 +1,88 @@
+using System;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using FastEndpoints;
+using Npgsql;
+using ExcelDataReader;
+using Microsoft.Extensions.Configuration;
+
+namespace QuantEngine.Web.Endpoints;
+
+/// <summary>
+/// BFF FastEndpoints for streaming Excel file upload and importing to PostgreSQL using COPY binary protocol.
+/// SOLID: Single Responsibility for streaming large files to prevent OOM.
+/// </summary>
+public class BulkInsertMarketExcelEndpoint : EndpointWithoutRequest
+{
+    private readonly string _connectionString;
+
+    public BulkInsertMarketExcelEndpoint(IConfiguration config)
+    {
+        _connectionString = config.GetConnectionString("DefaultConnection") 
+            ?? throw new ArgumentNullException("ConnectionStrings__DefaultConnection");
+        System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);
+    }
+
+    public override void Configure()
+    {
+        Post("/api/admin/market/upload-excel-stream");
+        AllowFileUploads();
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        if (Files.Count == 0)
+        {
+            await SendAsync(new { success = false, message = "업로드된 파일이 없습니다." }, 400, ct);
+            return;
+        }
+
+        var file = Files[0];
+        using var fileStream = file.OpenReadStream();
+        using var reader = ExcelReaderFactory.CreateReader(fileStream);
+
+        using var conn = new NpgsqlConnection(_connectionString);
+        await conn.OpenAsync(ct);
+
+        using var writer = await conn.BeginBinaryImportAsync(
+            "COPY quantengine.market_raw_history (ticker, as_of_date, close_price, nav_price, disparate_ratio, raw_payload, provenance) FROM STDIN (FORMAT BINARY)",
+            ct
+        );
+
+        bool isHeader = true;
+        int processedRows = 0;
+
+        while (reader.Read())
+        {
+            if (isHeader)
+            {
+                isHeader = false;
+                continue;
+            }
+
+            string ticker = reader.GetValue(0)?.ToString() ?? string.Empty;
+            string asOfDate = reader.GetValue(1)?.ToString() ?? string.Empty;
+            decimal closePrice = Convert.ToDecimal(reader.GetValue(2) ?? 0);
+            decimal navPrice = Convert.ToDecimal(reader.GetValue(3) ?? 0);
+            decimal disparateRatio = navPrice > 0 ? (closePrice - navPrice) / navPrice : 0;
+
+            if (string.IsNullOrWhiteSpace(ticker) || ticker.Length < 6) continue;
+
+            await writer.StartRowAsync(ct);
+            await writer.WriteAsync(ticker, ct);
+            await writer.WriteAsync(asOfDate, ct);
+            await writer.WriteAsync(closePrice, ct);
+            await writer.WriteAsync(navPrice, ct);
+            await writer.WriteAsync(disparateRatio, ct);
+            await writer.WriteAsync("{}", ct);
+            await writer.WriteAsync("{\"source\": \"excel_stream_uploader\"}", ct);
+
+            processedRows++;
+        }
+
+        await writer.CompleteAsync(ct);
+        await SendAsync(new { success = true, count = processedRows, message = "성공적으로 스트리밍 적재 완료되었습니다." }, cancellation: ct);
+    }
+}

src/dotnet/QuantEngine.Web/Endpoints/ExportStreamingFactorOlapEndpoint.cs

@@ -0,0 +1,64 @@
+using System;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using FastEndpoints;
+using Npgsql;
+using Microsoft.Extensions.Configuration;
+using Microsoft.AspNetCore.Http;
+
+namespace QuantEngine.Web.Endpoints;
+
+/// <summary>
+/// BFF FastEndpoints for downloading large factor output data using sequential data reader streams.
+/// SOLID: Single Responsibility for streaming CSV reports.
+/// </summary>
+public class ExportStreamingFactorOlapEndpoint : EndpointWithoutRequest
+{
+    private readonly string _connectionString;
+
+    public ExportStreamingFactorOlapEndpoint(IConfiguration config)
+    {
+        _connectionString = config.GetConnectionString("DefaultConnection") 
+            ?? throw new ArgumentNullException("ConnectionStrings__DefaultConnection");
+    }
+
+    public override void Configure()
+    {
+        Get("/api/admin/reports/export-factor-olap-stream");
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        HttpContext.Response.ContentType = "text/csv";
+        // ASP0019 대응: Headers.Append 또는 인덱서 사용
+        HttpContext.Response.Headers.Append("Content-Disposition", $"attachment; filename=Streaming_Factor_Report_{DateTime.Now:yyyyMMdd}.csv");
+
+        using var conn = new NpgsqlConnection(_connectionString);
+        await conn.OpenAsync(ct);
+
+        using var cmd = new NpgsqlCommand(@"
+            SELECT ticker, as_of_date, factor_id, score, calculation_state 
+            FROM quantengine.factor_output_history 
+            ORDER BY as_of_date DESC;", conn);
+            
+        using var reader = await cmd.ExecuteReaderAsync(System.Data.CommandBehavior.SequentialAccess, ct);
+        using var writer = new StreamWriter(HttpContext.Response.Body, System.Text.Encoding.UTF8);
+
+        await writer.WriteLineAsync("Ticker,AsOfDate,FactorId,Score,State");
+
+        while (await reader.ReadAsync(ct))
+        {
+            string ticker = reader.GetString(0);
+            string asOfDate = reader.GetString(1);
+            string factorId = reader.GetString(2);
+            decimal score = reader.GetDecimal(3);
+            string state = reader.GetString(4);
+
+            await writer.WriteLineAsync($"{ticker},{asOfDate},{factorId},{score},{state}");
+        }
+
+        await writer.FlushAsync();
+    }
+}

src/dotnet/QuantEngine.Web/Endpoints/UpdateFactorThresholdEndpoint.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using FastEndpoints;
+using Dapper;
+using Npgsql;
+using Microsoft.Extensions.Configuration;
+
+namespace QuantEngine.Web.Endpoints;
+
+public record UpdateThresholdRequest(string FactorId, string CalibrationState, string ThresholdParamsJson);
+public record UpdateThresholdResponse(bool Success, string Message);
+
+/// <summary>
+/// BFF FastEndpoints for updating factor threshold parameter logic.
+/// SOLID: Single Responsibility for updating factor settings.
+/// </summary>
+public class UpdateFactorThresholdEndpoint : Endpoint<UpdateThresholdRequest, UpdateThresholdResponse>
+{
+    private readonly string _connectionString;
+
+    public UpdateFactorThresholdEndpoint(IConfiguration config)
+    {
+        _connectionString = config.GetConnectionString("DefaultConnection") 
+            ?? throw new ArgumentNullException("ConnectionStrings__DefaultConnection");
+    }
+
+    public override void Configure()
+    {
+        Post("/api/admin/factors/update-threshold");
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(UpdateThresholdRequest req, CancellationToken ct)
+    {
+        using var conn = new NpgsqlConnection(_connectionString);
+        await conn.OpenAsync(ct);
+
+        const string sql = @"
+            UPDATE quantengine.factor_version_history 
+            SET calibration_state = @CalibrationState, 
+                threshold_params = @ThresholdParams::jsonb,
+                updated_at = NOW()
+            WHERE factor_id = @FactorId;";
+
+        int affectedRows = await conn.ExecuteAsync(sql, new {
+            req.FactorId,
+            req.CalibrationState,
+            ThresholdParams = req.ThresholdParamsJson
+        });
+
+        if (affectedRows > 0)
+        {
+            await SendAsync(new UpdateThresholdResponse(true, "성공적으로 반영되었습니다."), cancellation: ct);
+        }
+        else
+        {
+            await SendAsync(new UpdateThresholdResponse(false, "해당 Factor ID를 찾을 수 없습니다."), statusCode: 404, cancellation: ct);
+        }
+    }
+}

src/dotnet/QuantEngine.Web/QuantEngine.Web.csproj

@@ -7,6 +7,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="EPPlus" Version="8.6.3" />
+    <PackageReference Include="ExcelDataReader" Version="3.9.0" />
     <PackageReference Include="FastEndpoints" Version="5.34.0" />
     <PackageReference Include="Hangfire.AspNetCore" Version="1.8.23" />
     <PackageReference Include="Hangfire.Core" Version="1.8.23" />