rename DbExceptionHandlers to better reflect their intent.

src/modules/Elsa.EntityFrameworkCore.PostgreSql/Features.cs

@@ -23,7 +23,7 @@ public static class PostgreSqlProvidersExtensions
     public static EFCoreIdentityPersistenceFeature UsePostgreSql(this EFCoreIdentityPersistenceFeature feature, string connectionString, ElsaDbContextOptions? options = default)
     {
         feature.DbContextOptionsBuilder = (_, db) => db.UseElsaPostgreSql(Assembly, connectionString, options);
-        feature.DbExceptionHandler = _ => new DbExceptionHandler();
+        feature.DbExceptionHandler = _ => new DbExceptionTransformer();
         return feature;
     }
     
@@ -33,7 +33,7 @@ public static class PostgreSqlProvidersExtensions
     public static EFCoreAlterationsPersistenceFeature UsePostgreSql(this EFCoreAlterationsPersistenceFeature feature, string connectionString, ElsaDbContextOptions? options = default)
     {
         feature.DbContextOptionsBuilder = (_, db) => db.UseElsaPostgreSql(Assembly, connectionString, options);
-        feature.DbExceptionHandler = _ => new DbExceptionHandler();
+        feature.DbExceptionHandler = _ => new DbExceptionTransformer();
         return feature;
     }
     
@@ -43,7 +43,7 @@ public static class PostgreSqlProvidersExtensions
     public static EFCoreLabelPersistenceFeature UsePostgreSql(this EFCoreLabelPersistenceFeature feature, string connectionString, ElsaDbContextOptions? options = default)
     {
         feature.DbContextOptionsBuilder = (_, db) => db.UseElsaPostgreSql(Assembly, connectionString, options);
-        feature.DbExceptionHandler = _ => new DbExceptionHandler();
+        feature.DbExceptionHandler = _ => new DbExceptionTransformer();
         return feature;
     }
     
@@ -53,7 +53,7 @@ public static class PostgreSqlProvidersExtensions
     public static EFCoreWorkflowDefinitionPersistenceFeature UsePostgreSql(this EFCoreWorkflowDefinitionPersistenceFeature feature, string connectionString, ElsaDbContextOptions? options = default)
     {
         feature.DbContextOptionsBuilder = (_, db) => db.UseElsaPostgreSql(Assembly, connectionString, options);
-        feature.DbExceptionHandler = _ => new DbExceptionHandler();
+        feature.DbExceptionHandler = _ => new DbExceptionTransformer();
         return feature;
     }
     
@@ -63,7 +63,7 @@ public static class PostgreSqlProvidersExtensions
     public static EFCoreWorkflowInstancePersistenceFeature UsePostgreSql(this EFCoreWorkflowInstancePersistenceFeature feature, string connectionString, ElsaDbContextOptions? options = default)
     {
         feature.DbContextOptionsBuilder = (_, db) => db.UseElsaPostgreSql(Assembly, connectionString, options);
-        feature.DbExceptionHandler = _ => new DbExceptionHandler();
+        feature.DbExceptionHandler = _ => new DbExceptionTransformer();
         return feature;
     }
     
@@ -73,7 +73,7 @@ public static class PostgreSqlProvidersExtensions
     public static WorkflowManagementPersistenceFeature UsePostgreSql(this WorkflowManagementPersistenceFeature feature, string connectionString, ElsaDbContextOptions? options = default)
     {
         feature.DbContextOptionsBuilder = (_, db) => db.UseElsaPostgreSql(Assembly, connectionString, options);
-        feature.DbExceptionHandler = _ => new DbExceptionHandler();
+        feature.DbExceptionHandler = _ => new DbExceptionTransformer();
         return feature;
     }
     
@@ -83,7 +83,7 @@ public static class PostgreSqlProvidersExtensions
     public static EFCoreWorkflowRuntimePersistenceFeature UsePostgreSql(this EFCoreWorkflowRuntimePersistenceFeature feature, string connectionString, ElsaDbContextOptions? options = default)
     {
         feature.DbContextOptionsBuilder = (_, db) => db.UseElsaPostgreSql(Assembly, connectionString, options);
-        feature.DbExceptionHandler = _ => new DbExceptionHandler();
+        feature.DbExceptionHandler = _ => new DbExceptionTransformer();
         return feature;
     }
 }

src/modules/Elsa.EntityFrameworkCore.PostgreSql/Handlers/DbExceptionTransformer.cs

@@ -10,16 +10,14 @@ using Npgsql;
 
 namespace Elsa.EntityFrameworkCore.PostgreSql.Handlers;
 
-/// <summary>
-/// Handles database exceptions encountered when using a postgreSQL database.
-/// </summary>
-public class DbExceptionHandler : IDbExceptionHandler<AlterationsElsaDbContext>,
+/// Transforms database exceptions encountered when using a postgreSQL database into more generic exceptions.
+public class DbExceptionTransformer : IDbExceptionHandler<AlterationsElsaDbContext>,
     IDbExceptionHandler<IdentityElsaDbContext>,
     IDbExceptionHandler<LabelsElsaDbContext>,
     IDbExceptionHandler<ManagementElsaDbContext>,
     IDbExceptionHandler<RuntimeElsaDbContext>
 {
-    /// Handles database exceptions encountered when using a postgreSQL database.
+    /// Transforms database exceptions encountered when using a postgreSQL database into more generic exceptions.
     public void Handle(DbUpdateException exception)
     {
         var ex = exception.InnerException as PostgresException;

src/modules/Elsa.EntityFrameworkCore/Handlers/RethrowDbExceptionHandler.cs

@@ -8,14 +8,14 @@ using Microsoft.EntityFrameworkCore;
 
 namespace Elsa.EntityFrameworkCore.Handlers;
 
-/// A No-Op database exception handler.
-public class NoopDbExceptionHandler : IDbExceptionHandler<AlterationsElsaDbContext>,
+/// A database exception handler that rethrows the original exception.
+public class RethrowDbExceptionHandler : IDbExceptionHandler<AlterationsElsaDbContext>,
     IDbExceptionHandler<IdentityElsaDbContext>,
     IDbExceptionHandler<LabelsElsaDbContext>,
     IDbExceptionHandler<ManagementElsaDbContext>,
     IDbExceptionHandler<RuntimeElsaDbContext>
 {
-    /// Handles the given exception that occurs during database operations.
+    /// rethrows the given exception that occurs during database operations.
     public void Handle(DbUpdateException exception)
     {
         throw exception;

src/modules/Elsa.EntityFrameworkCore/Modules/Alterations/Feature.cs

@@ -16,7 +16,7 @@ namespace Elsa.EntityFrameworkCore.Modules.Alterations;
 public class EFCoreAlterationsPersistenceFeature(IModule module) : PersistenceFeatureBase<AlterationsElsaDbContext>(module)
 {
     /// Delegate for determining the exception handler.
-    public Func<IServiceProvider, IDbExceptionHandler<AlterationsElsaDbContext>> DbExceptionHandler { get; set; } = _ => new NoopDbExceptionHandler();
+    public Func<IServiceProvider, IDbExceptionHandler<AlterationsElsaDbContext>> DbExceptionHandler { get; set; } = _ => new RethrowDbExceptionHandler();
 
     /// <inheritdoc />
     public override void Configure()

src/modules/Elsa.EntityFrameworkCore/Modules/Identity/Feature.cs

@@ -18,7 +18,7 @@ namespace Elsa.EntityFrameworkCore.Modules.Identity;
 public class EFCoreIdentityPersistenceFeature(IModule module) : PersistenceFeatureBase<IdentityElsaDbContext>(module)
 {
     /// Delegate for determining the exception handler.
-    public Func<IServiceProvider, IDbExceptionHandler<IdentityElsaDbContext>> DbExceptionHandler { get; set; } = _ => new NoopDbExceptionHandler();
+    public Func<IServiceProvider, IDbExceptionHandler<IdentityElsaDbContext>> DbExceptionHandler { get; set; } = _ => new RethrowDbExceptionHandler();
 
     /// <inheritdoc />
     public override void Configure()

src/modules/Elsa.EntityFrameworkCore/Modules/Labels/Feature.cs

@@ -14,7 +14,7 @@ namespace Elsa.EntityFrameworkCore.Modules.Labels;
 public class EFCoreLabelPersistenceFeature(IModule module) : PersistenceFeatureBase<LabelsElsaDbContext>(module)
 {
     /// Delegate for determining the exception handler.
-    public Func<IServiceProvider, IDbExceptionHandler<LabelsElsaDbContext>> DbExceptionHandler { get; set; } = _ => new NoopDbExceptionHandler();
+    public Func<IServiceProvider, IDbExceptionHandler<LabelsElsaDbContext>> DbExceptionHandler { get; set; } = _ => new RethrowDbExceptionHandler();
 
     public override void Configure()
     {

src/modules/Elsa.EntityFrameworkCore/Modules/Management/WorkflowDefinitionPersistenceFeature.cs

@@ -16,7 +16,7 @@ namespace Elsa.EntityFrameworkCore.Modules.Management;
 public class EFCoreWorkflowDefinitionPersistenceFeature(IModule module) : PersistenceFeatureBase<ManagementElsaDbContext>(module)
 {
     /// Delegate for determining the exception handler.
-    public Func<IServiceProvider, IDbExceptionHandler<ManagementElsaDbContext>> DbExceptionHandler { get; set; } = _ => new NoopDbExceptionHandler(); 
+    public Func<IServiceProvider, IDbExceptionHandler<ManagementElsaDbContext>> DbExceptionHandler { get; set; } = _ => new RethrowDbExceptionHandler(); 
 
     /// <inheritdoc />
     public override void Configure()

src/modules/Elsa.EntityFrameworkCore/Modules/Management/WorkflowInstancePersistenceFeature.cs

@@ -16,7 +16,7 @@ namespace Elsa.EntityFrameworkCore.Modules.Management;
 public class EFCoreWorkflowInstancePersistenceFeature(IModule module) : PersistenceFeatureBase<ManagementElsaDbContext>(module)
 {
     /// Delegate for determining the exception handler.
-    public Func<IServiceProvider, IDbExceptionHandler<ManagementElsaDbContext>> DbExceptionHandler { get; set; } = _ => new NoopDbExceptionHandler(); 
+    public Func<IServiceProvider, IDbExceptionHandler<ManagementElsaDbContext>> DbExceptionHandler { get; set; } = _ => new RethrowDbExceptionHandler(); 
 
     /// <inheritdoc />
     public override void Configure()

src/modules/Elsa.EntityFrameworkCore/Modules/Management/WorkflowManagementPersistenceFeature.cs

@@ -20,7 +20,7 @@ namespace Elsa.EntityFrameworkCore.Modules.Management;
 public class WorkflowManagementPersistenceFeature(IModule module) : PersistenceFeatureBase<ManagementElsaDbContext>(module)
 {
     /// Delegate for determining the exception handler.
-    public Func<IServiceProvider, IDbExceptionHandler<ManagementElsaDbContext>> DbExceptionHandler { get; set; } = _ => new NoopDbExceptionHandler(); 
+    public Func<IServiceProvider, IDbExceptionHandler<ManagementElsaDbContext>> DbExceptionHandler { get; set; } = _ => new RethrowDbExceptionHandler(); 
 
     /// <inheritdoc />
     public override void Configure()

src/modules/Elsa.EntityFrameworkCore/Modules/Runtime/WorkflowRuntimePersistenceFeature.cs

@@ -18,7 +18,7 @@ namespace Elsa.EntityFrameworkCore.Modules.Runtime;
 public class EFCoreWorkflowRuntimePersistenceFeature(IModule module) : PersistenceFeatureBase<RuntimeElsaDbContext>(module)
 {
     /// Delegate for determining the exception handler.
-    public Func<IServiceProvider, IDbExceptionHandler<RuntimeElsaDbContext>> DbExceptionHandler { get; set; } = _ => new NoopDbExceptionHandler(); 
+    public Func<IServiceProvider, IDbExceptionHandler<RuntimeElsaDbContext>> DbExceptionHandler { get; set; } = _ => new RethrowDbExceptionHandler(); 
 
     /// <inheritdoc />
     public override void Configure()