refactor(dotnet): remove aggregate collection repository contract

src/dotnet/QuantEngine.Application/Services/JsonSeedIngestionService.cs

@@ -12,12 +12,12 @@ namespace QuantEngine.Application.Services;
 public sealed class JsonSeedIngestionService
 {
     private readonly GatherTradingDataParser _parser;
-    private readonly ICollectionRepository _repository;
+    private readonly ICollectionWriteRepository _repository;
     private readonly ILogger<JsonSeedIngestionService> _logger;
 
     public JsonSeedIngestionService(
         GatherTradingDataParser parser,
-        ICollectionRepository repository,
+        ICollectionWriteRepository repository,
         ILogger<JsonSeedIngestionService> logger)
     {
         _parser = parser;

src/dotnet/QuantEngine.Core.Tests/KisDataCollectionOrchestratorTests.cs

@@ -24,9 +24,8 @@ public class KisDataCollectionOrchestratorTests
     public KisDataCollectionOrchestratorTests()
     {
         _kisApiClientMock = new Mock<IKisApiClient>();
-        var repositoryMock = new Mock<ICollectionRepository>();
-        _writeRepositoryMock = repositoryMock.As<ICollectionWriteRepository>();
-        _readRepositoryMock = repositoryMock.As<ICollectionReadRepository>();
+        _writeRepositoryMock = new Mock<ICollectionWriteRepository>();
+        _readRepositoryMock = new Mock<ICollectionReadRepository>();
         _loggerMock = new Mock<ILogger<KisDataCollectionOrchestrator>>();
         _auditTrailMock = new Mock<IRuntimeAuditTrailService>();
         _priorityResolver = new SourcePriorityResolver();

src/dotnet/QuantEngine.Core/Interfaces/ICollectionRepository.cs

@@ -1,66 +0,0 @@
-namespace QuantEngine.Core.Interfaces;
-
-/// <summary>
-/// Data collection repository (Dapper + PostgreSQL).
-/// Higher-level abstraction over IDataCollectionStore for Web API consumers.
-/// </summary>
-public interface ICollectionRepository
-{
-    /// <summary>
-    /// Save new collection run.
-    /// </summary>
-    Task SaveRunAsync(CollectionRunRecord run);
-
-    /// <summary>
-    /// Update run with completion status.
-    /// </summary>
-    Task UpdateRunStatusAsync(string runId, string status, string? finishedAt = null, int? totalSnapshots = null, int? totalErrors = null);
-
-    /// <summary>
-    /// Save collection snapshot.
-    /// </summary>
-    Task SaveSnapshotAsync(CollectionSnapshotRecord snapshot);
-
-    /// <summary>
-    /// Save collection error.
-    /// </summary>
-    Task SaveErrorAsync(CollectionErrorRecord error);
-
-    /// <summary>
-    /// Fetch recent collection runs for UI dashboard.
-    /// </summary>
-    /// <param name="limit">Number of runs to return (default: 20)</param>
-    Task<List<CollectionRunRecord>> GetRecentRunsAsync(int limit = 20);
-
-    /// <summary>
-    /// Fetch snapshots for a specific run.
-    /// </summary>
-    Task<List<CollectionSnapshotRecord>> GetRunSnapshotsAsync(string runId);
-
-    /// <summary>
-    /// Fetch errors for a specific run.
-    /// </summary>
-    /// <param name="runId">Run ID</param>
-    /// <param name="limit">Max errors to return (default: 50)</param>
-    Task<List<CollectionErrorRecord>> GetRunErrorsAsync(string runId, int limit = 50);
-
-    /// <summary>
-    /// Get collection pipeline dashboard state for Web UI.
-    /// </summary>
-    Task<CollectionDashboardStateRecord> GetDashboardStateAsync();
-
-    /// <summary>
-    /// Fetch latest snapshots for a ticker across all datasets.
-    /// </summary>
-    Task<List<CollectionSnapshotRecord>> GetLatestSnapshotsForTickerAsync(string ticker, int limit = 10);
-
-    /// <summary>
-    /// Save daily price history bar (OHLCV). Idempotent via ON CONFLICT DO NOTHING.
-    /// </summary>
-    Task SavePriceHistoryDailyAsync(PriceHistoryDailyRecord record);
-
-    /// <summary>
-    /// Get price history summary per ticker (row count, first/last dates).
-    /// </summary>
-    Task<List<PriceHistorySummaryRecord>> GetPriceHistorySummaryAsync();
-}

src/dotnet/QuantEngine.Infrastructure/Repositories/CollectionRepository.cs

@@ -8,7 +8,7 @@ using QuantEngine.Infrastructure.Data;
 
 namespace QuantEngine.Infrastructure.Repositories
 {
-    public class CollectionRepository : ICollectionRepository, ICollectionReadRepository, ICollectionWriteRepository
+    public class CollectionRepository : ICollectionReadRepository, ICollectionWriteRepository
     {
         private readonly IDbConnectionFactory _connectionFactory;
 

src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Detail.cshtml.cs

@@ -2,6 +2,7 @@ using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.RazorPages;
 using QuantEngine.Core.Interfaces;
+using QuantEngine.Application.Interfaces;
 using QuantEngine.Web.Services;
 
 namespace QuantEngine.Web.Pages.Admin.Collection;
@@ -9,12 +10,12 @@ namespace QuantEngine.Web.Pages.Admin.Collection;
 [Authorize(AuthenticationSchemes = AdminAuthDefaults.Scheme)]
 public class DetailModel : PageModel
 {
-    private readonly ICollectionRepository _collectionRepository;
+    private readonly ICollectionReadRepository _collectionRepository;
     private readonly ILogger<DetailModel> _logger;
 
     public CollectionRunRecord? Run { get; set; }
 
-    public DetailModel(ICollectionRepository collectionRepository, ILogger<DetailModel> logger)
+    public DetailModel(ICollectionReadRepository collectionRepository, ILogger<DetailModel> logger)
     {
         _collectionRepository = collectionRepository;
         _logger = logger;

src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Errors.cshtml.cs

@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc.RazorPages;
 using QuantEngine.Core.Interfaces;
+using QuantEngine.Application.Interfaces;
 using QuantEngine.Web.Services;
 
 namespace QuantEngine.Web.Pages.Admin.Collection;
@@ -8,13 +9,13 @@ namespace QuantEngine.Web.Pages.Admin.Collection;
 [Authorize(AuthenticationSchemes = AdminAuthDefaults.Scheme)]
 public class ErrorsModel : PageModel
 {
-    private readonly ICollectionRepository _collectionRepository;
+    private readonly ICollectionReadRepository _collectionRepository;
     private readonly ILogger<ErrorsModel> _logger;
 
     public string? RunId { get; set; }
     public List<CollectionErrorRecord>? Errors { get; set; }
 
-    public ErrorsModel(ICollectionRepository collectionRepository, ILogger<ErrorsModel> logger)
+    public ErrorsModel(ICollectionReadRepository collectionRepository, ILogger<ErrorsModel> logger)
     {
         _collectionRepository = collectionRepository;
         _logger = logger;

src/dotnet/QuantEngine.Web/Pages/Admin/Collection/Snapshots.cshtml.cs

@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc.RazorPages;
 using QuantEngine.Core.Interfaces;
+using QuantEngine.Application.Interfaces;
 using QuantEngine.Web.Services;
 
 namespace QuantEngine.Web.Pages.Admin.Collection;
@@ -8,13 +9,13 @@ namespace QuantEngine.Web.Pages.Admin.Collection;
 [Authorize(AuthenticationSchemes = AdminAuthDefaults.Scheme)]
 public class SnapshotsModel : PageModel
 {
-    private readonly ICollectionRepository _collectionRepository;
+    private readonly ICollectionReadRepository _collectionRepository;
     private readonly ILogger<SnapshotsModel> _logger;
 
     public string? RunId { get; set; }
     public List<CollectionSnapshotRecord>? Snapshots { get; set; }
 
-    public SnapshotsModel(ICollectionRepository collectionRepository, ILogger<SnapshotsModel> logger)
+    public SnapshotsModel(ICollectionReadRepository collectionRepository, ILogger<SnapshotsModel> logger)
     {
         _collectionRepository = collectionRepository;
         _logger = logger;

src/dotnet/QuantEngine.Web/Pages/Admin/Monitoring/Index.cshtml.cs

@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc.RazorPages;
 using QuantEngine.Core.Interfaces;
+using QuantEngine.Application.Interfaces;
 using QuantEngine.Web.Services;
 
 namespace QuantEngine.Web.Pages.Admin.Monitoring;
@@ -8,7 +9,7 @@ namespace QuantEngine.Web.Pages.Admin.Monitoring;
 [Authorize(AuthenticationSchemes = AdminAuthDefaults.Scheme)]
 public class IndexModel : PageModel
 {
-    private readonly ICollectionRepository _collectionRepository;
+    private readonly ICollectionReadRepository _collectionRepository;
     private readonly ILogger<IndexModel> _logger;
 
     public List<CollectionRunRecord>? OngoingRuns { get; set; }
@@ -19,7 +20,7 @@ public class IndexModel : PageModel
     public List<CollectionErrorRecord>? RecentErrors { get; set; }
     public bool IsDatabaseConnected { get; set; }
 
-    public IndexModel(ICollectionRepository collectionRepository, ILogger<IndexModel> logger)
+    public IndexModel(ICollectionReadRepository collectionRepository, ILogger<IndexModel> logger)
     {
         _collectionRepository = collectionRepository;
         _logger = logger;

src/dotnet/QuantEngine.Web/Program.cs

@@ -108,7 +108,6 @@ try
     builder.Services.AddScoped<IPostgresqlHistorySnapshotReader, PostgresqlHistorySnapshotReader>();
     builder.Services.AddScoped<HistoryIngestionService>();
     builder.Services.AddScoped<CollectionRepository>();
-    builder.Services.AddScoped<ICollectionRepository>(sp => sp.GetRequiredService<CollectionRepository>());
     builder.Services.AddScoped<ICollectionReadRepository>(sp => sp.GetRequiredService<CollectionRepository>());
     builder.Services.AddScoped<ICollectionWriteRepository>(sp => sp.GetRequiredService<CollectionRepository>());
     builder.Services.AddSingleton<ICollectionSchemaInitializer, CollectionSchemaInitializer>();
@@ -151,7 +150,7 @@ try
     {
         var migrator = scope.ServiceProvider.GetRequiredService<DbMigrator>();
         var workspaceRepo = scope.ServiceProvider.GetRequiredService<IWorkspaceRepository>();
-        var collectionRepo = scope.ServiceProvider.GetRequiredService<ICollectionRepository>();
+        var collectionRepo = scope.ServiceProvider.GetRequiredService<ICollectionReadRepository>();
         var collectionSchemaInitializer = scope.ServiceProvider.GetRequiredService<ICollectionSchemaInitializer>();
         var tokenCache = scope.ServiceProvider.GetRequiredService<ITokenCache>();