CQRSharp 2.2.6

• net10.0

  • CQRSharp.Shared (>= 2.2.6)
  • Microsoft.Extensions.DependencyInjection (>= 9.0.2)
  • Microsoft.Extensions.DependencyInjection.Abstractions (>= 9.0.2)
  • Microsoft.Extensions.Hosting (>= 9.0.2)
  • Microsoft.Extensions.Logging (>= 9.0.2)
  • Microsoft.Extensions.Logging.Console (>= 9.0.2)

• net8.0

  • CQRSharp.Shared (>= 2.2.6)
  • Microsoft.Extensions.DependencyInjection (>= 9.0.2)
  • Microsoft.Extensions.DependencyInjection.Abstractions (>= 9.0.2)
  • Microsoft.Extensions.Hosting (>= 9.0.2)
  • Microsoft.Extensions.Logging (>= 9.0.2)
  • Microsoft.Extensions.Logging.Console (>= 9.0.2)

• net9.0

  • CQRSharp.Shared (>= 2.2.6)
  • Microsoft.Extensions.DependencyInjection (>= 9.0.2)
  • Microsoft.Extensions.DependencyInjection.Abstractions (>= 9.0.2)
  • Microsoft.Extensions.Hosting (>= 9.0.2)
  • Microsoft.Extensions.Logging (>= 9.0.2)
  • Microsoft.Extensions.Logging.Console (>= 9.0.2)

Version 2.2.6 (2025‑04‑20)
           
           Breaking Changes
           - `QueueBackgroundWorkItemAsync` now returns `Task<QueueWriteResult>` instead of a fire‑and‑forget `Task`.
           - `IBackgroundTaskQueue` no longer exposes `OnTaskEnqueued`/`OnTaskRejected` events; use the notification channel.
           - `BackgroundTaskQueue.DequeueAsync` signature changed to `ValueTask<QueuedTask>`.
           - `BackgroundTaskQueueOptions.DequeueBatchSize` deprecated in favor of `CallbackChannelCapacity` and `ShutdownTimeout`.
           - All `.ContinueWith` usage in the Dispatcher was replaced by `async`/`await`, preserving stack traces and the `SynchronizationContext`.
           
           Added
           - **Dispatcher**: `EnqueueAndWatchAsync` helper; simplified `finalHandlerWrapper` logic.
           - **DI Extensions**: `CqrsStartupLogger` (`IHostedService`) & `CqrsRegistrationInfo` for deferred CQRS‑registration logging.
           - **RateLimiter**: `ShardedLruCache` with per‑shard LRU eviction; implements `IDisposable` to tear down the cleanup timer.
           - **BackgroundTaskQueue**:
             - `QueuedTask` struct (with `QueueId`, `SequenceNumber`, `EnqueueTime`) and `QueueWriteResult` struct.
             - Built‑in metrics: `TotalItemsEnqueued`, `TotalDroppedNewest`, `TotalDroppedOldest`.
             - Dedicated notification channel via `INotificationDispatcher`.
             - `CountingChannelReader` for atomic queue‑depth tracking.
           - **BackgroundTaskQueueConsumer**: single loop gated by a `SemaphoreSlim` (`ConsumerCount`); lifecycle logging; `ShutdownTimeout` support.
           
           Changed
           - **Dispatcher**: `ExecuteCommand` now returns a `Task` immediately in async mode.
           - **RateLimiter**:
             - Corrected refill formula to apply `replenishRatePerSecond` directly.
             - High‑precision timing via `Stopwatch.GetTimestamp()`.
             - Sliding‑expiration cleanup via explicit snapshot and background timer.
           - **BackgroundTaskQueue**:
             - Consolidated multi‑shard design into a single bounded `Channel<QueuedTask>`.
             - Explicit implementation of all `BoundedChannelFullMode` policies (`Wait`, `DropNewest`, `DropOldest`, `Throw`).
             - Replaced manual `WaitToReadAsync` and`TryRead` loops with `ReadAllAsync()`.
             - Refactored notification dispatch into `ProcessNotificationsAsync` with retry parameters.
           
           Removed
           - All `.ContinueWith` calls; static CQRS‑registrar logging at DI setup.
           - Third‑party/`MemoryCache` dependencies in `RateLimiter`.
           - Busy‑wait loops and redundant `Task.Run` calls in the background queue.
           - Public `OnTaskEnqueued`/`OnTaskRejected` events on `IBackgroundTaskQueue`.
           
           Fixed
           - Race conditions in `DropOldest`/`DropNewest` policies under contention.
           - Cancellation and exception propagation in `Dispatcher.EnqueueAndWatchAsync`.
           - Timer leak in `RateLimiter` by implementing `Dispose`.
           - Refill‑rate drift in token‑bucket logic; restored full exception stacks by removing `.ContinueWith`.
           
           Performance
           - **Dispatcher**: end‑to‑end `await` for context‑safe execution.
           - **RateLimiter**: sharded cache + stopwatch timing for minimal contention.
           - **BackgroundTaskQueue**: single channel + `CountingChannelReader` for lock‑free depth tracking.
           - **Consumer**: `SemaphoreSlim`‑gated loop avoids thread‑pool storms.
           
           Testing
           - **DispatcherTests**: sync/async execution, cancellation, exception‑propagation coverage.
           - **RateLimiterTests**: refill accuracy, shard eviction, timer disposal.
           - **BackgroundTaskQueueTests**: backpressure modes, FIFO ordering, metrics, high‑concurrency and graceful shutdown.
           - **RequestDispatcherTests**: host‑lifetime cancellation via `TestHostApplicationLifetime`.
           - **BackgroundTaskQueueConsumerTests**: concurrency gating and lifecycle logging.
           
           Documentation
           - Updated XML docs for new options (`EnableMetrics`, `NotificationMaxRetries`, `ShutdownTimeout`, `MetricLogInterval`).
           - Clarified defaults and valid ranges in `BackgroundTaskQueueOptions` and `RateLimiterOptions`.