Allow CommandHandlers to have scoped dependencies (#64)

* Register ICommandProcessorFactory, ICommandHandlerFactory
and CommandProcessor as transient
to allow to CommandHandler to use scoped dependencies.

* Update changelog

---------

Co-authored-by: Andreas Gehrke <[email protected]>

Author: agehrke

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+- Changed `ICommandProcessorFactory`, `ICommandHandlerFactory` and `CommandProcessor<>` to be 
+ registered as transient rather than singleton. This allows `CommandHandler` implementations to use 
+ dependencies registered as scoped.
+
 ## [1.17.0] - 2025-03-21
 
 ### Fixed

src/Atc.Cosmos.EventStore.Cqrs/DependencyInjection/EventStoreOptionsBuilderExtensions.cs

@@ -20,9 +20,9 @@ public static EventStoreOptionsBuilder UseCQRS(
 
         builder.Services.AddSingleton(typeof(IStateProjector<>), typeof(StateProjector<>));
         builder.Services.AddSingleton(typeof(IStateWriter<>), typeof(StateWriter<>));
-        builder.Services.AddSingleton(typeof(ICommandProcessor<>), typeof(CommandProcessor<>));
-        builder.Services.AddSingleton<ICommandProcessorFactory, CommandProcessorFactory>();
-        builder.Services.AddSingleton<ICommandHandlerFactory, CommandHandlerFactory>();
+        builder.Services.AddTransient(typeof(ICommandProcessor<>), typeof(CommandProcessor<>));
+        builder.Services.AddTransient<ICommandProcessorFactory, CommandProcessorFactory>();
+        builder.Services.AddTransient<ICommandHandlerFactory, CommandHandlerFactory>();
         builder.Services.AddSingleton<ICommandTelemetry, CommandTelemetry>();
 
         builder.Services.AddSingleton<IProjectionOptionsFactory, ProjectionOptionsFactory>();