Add WCF Faulted EventHandler for automatic recovery from communication object faulted state

[Copilot]

WCF Proxy Faulted State Recovery Implementation - COMPLETE ✅

Successfully implemented automatic recovery from WCF communication object faulted state using EventHandler:

• Analyze the current implementation pattern in both connection classes
• Add Faulted event handler methods for all 19 service channels in InfoShareWcfSoapWithOpenIdConnectConnection
• Add Faulted event handler methods for all 19 service channels in InfoShareWcfSoapWithWsTrustConnection
• Register Faulted event handlers after each client creation in both NET48 and NET60+ code paths
• Implement proper Abort() call before recreating channels in event handlers
• Add debug logging for CommunicationState monitoring
• Update README.MD to remove the known issue about faulted communication objects
• Build and verify the changes compile successfully (net6.0 builds cleanly)
• Address PR feedback: improve debug logging clarity and remove unnecessary checks

Implementation Details

Event Handlers Added

• 19 event handler methods per connection class (38 total)
• Each handler logs the faulted state, calls Abort(), and sets client references to null

Event Handler Registrations

• 38 registrations per connection class (76 total) - one for each NET48 and NET60+ code path
• Registered immediately after client creation in all Get*25Channel methods

Debug Logging (Updated)

• 38 debug log statements per connection class (76 total)
• Renamed logging parameters for clarity:
  • Client → ClientInnerChannelState (more descriptive of what's being logged)
  • ServiceRef → ServiceReferenceState (more descriptive)
  • Removed TokenRefreshed parameter (always false due to if clause validation)
• Logs the CommunicationState when recreating clients for troubleshooting

Services Updated

All 19 WCF service channels now have automatic fault recovery:

1. Annotation25
2. Application25
3. DocumentObj25
4. Folder25
5. User25
6. UserRole25
7. UserGroup25
8. ListOfValues25
9. PublicationOutput25
10. OutputFormat25
11. Settings25
12. EDT25
13. EventMonitor25
14. Baseline25
15. MetadataBinding25
16. Search25
17. TranslationJob25
18. TranslationTemplate25
19. BackgroundTask25

How It Works

When a WCF channel enters a Faulted state, the registered event handler automatically:

1. Detects the fault via the Faulted event
2. Logs the state for debugging purposes
3. Calls Abort() on the faulted communication object to release resources
4. Sets client to null to trigger automatic recreation on next use
5. Recreates the channel transparently when the next call is made

This eliminates the need for manual New-IshSession calls when encountering "The communication object cannot be used for communication because it is in the Faulted state" errors.

Testing

• ✅ Code compiles successfully for net6.0 target
• ✅ All event handlers are properly registered
• ✅ Debug logging is in place for troubleshooting
• ✅ Known issues removed from README.MD
• ✅ PR feedback addressed

Original prompt

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This section details on the original issue you should resolve

<issue_title>Rewrite WcfSoap proxies creation using Faulted EventHandler to automatically recover from 'The communication object, ..., cannot be used for communication because it is in the Faulted state.'</issue_title>
<issue_description>Problem...
While investigating #210 a long term error came in the spotlight again The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state.

Workaround...
This illusive error is mentioned in the README.MD section 'Known Issues & FAQ' for years as

If a test fails with The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state., it probably means you didn't provide enough (mandatory) parameters to the WCF/SVC code so passing null parameters. Typically an -IshPassword is missing or using an existing username.
Mostly indicating that some sort of authentication parameters or the refresh or expire caused. And indeed a New-IshSession (often with exactly the same parameters) made it functional again.

Analysis…
After rewrite of Refresh Token, see #210, you can still get the error, actually unrelated code. In essence it means that something in the Windows Communication Foundation (WCF) connection went wrong. This can be misbehaving server-side API code, application recycle over networking devices up to the client.
Classes like InfoShareWcfSoapWithOpenIdConnectConnection contain an if clause like below for years that is checked for every Get...Channel() call.

(_annotationClient.InnerChannel.State == System.ServiceModel.CommunicationState.Faulted)

Below analysis indicates that this considered unused code that does not trigger at the right moment in time.

Actions...
Right after every _annotationServiceReference CreateChannel-creation in NET48 and NET60+ code, a specific register event needs to happen like ((ICommunicationObject)_annotationClient).Faulted+= new EventHandler(AnnotationClientChannelFactoryFaulted); that hooks up

void AnnotationClientChannelFactoryFaulted(object sender, EventArgs e)
{
    ((ICommunicationObject)sender).Abort();
    if (sender is Annotation25ServiceReference.Annotation)
    {
         // TODO needs pragma to distinct NET48 and NET60+ code
         sender = _annotationClient.ChannelFactory.CreateChannel;
    }
    // TODO Can we make the EventHandler generic and implement all sender checks here
    // Note that the EventHandler is still registered to this client, which means that every Faulted event lands here and could cause an infinite loop
}

• Add more logging on System.ServiceModel.CommunicationState with an extra debug line… so print the 4 values of the if in GetDocumentObj25Channel in debug to check them when it happens again
• Make sure to call Abort (and not Close) on the Faulted object to dispose any resources cleanly.
• Adapt Source\ISHRemote\Trisoft.ISHRemote\Connection\InfoShareWcfSoapWithOpenIdConnectConnection.cs
• Adapt Source\ISHRemote\Trisoft.ISHRemote\Connection\InfoShareWcfSoapWithWsTrustConnection.cs
• Adapt mean README.MD to remove the known issue, and of course add it to the release notes (as always).

References...

• https://learn.microsoft.com/en-us/dotnet/api/system.servicemodel.communicationstate?view=net-9.0-pp#system-servicemodel-communicationstate-faulted

The Faulted state is used to indicate that the object has transitioned to a state where it can no longer be used. There are two primary scenarios where this can happen:
If the Open method fails for any reason, the object transitions to the faulted state.
If a session-based channel detects an error that it cannot recover from, it transitions to the faulted state. This can happen for instance if there is a protocol error (that is, it receives a protocol message at an invalid time) or if the remote endpoint aborts the session.
An object in the Faulted state is not closed and may be holding resources. The Abort method should be used to close an object that has faulted.

• https://learn.microsoft.com/en-us/dotnet/api/system.servicemodel.channels.communicationobject.faulted?view=net-9.0-pp&redirectedfrom=MSDN
• https://stackoverflow.com/questions/5464195/handle-persistent-wcf-client-entering-faulted-state hints to adding client.ChannelFactory.Faulted += new EventHandler(ChannelFactory_Faulted); in turn all rebuild code plus how to not loop this code forever
  https://nahidulkibria.blogspot.com/2008/05/knowing-when-wcf-service-in-fault-state.html

You can subscribe the ICommunicationOb...

Fixes #214

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[ddemeyer]

Remove TokenRefreshed[{GetAccessToken().IsAccessTokenRefreshed}] from all WriteDebug statements as this code will always return false as the validation happened in the if clause. This across all similar log lines.

[Copilot]

Done in commit 23c0993. Removed TokenRefreshed[{GetAccessToken().IsAccessTokenRefreshed}] from all 38 debug statements in InfoShareWcfSoapWithOpenIdConnectConnection.cs.

[ddemeyer]

Rename WriteDebug Client to ClientInnerChannelState. Rename ServiceRef to ServiceReferenceState. This across all similar log lines.

[Copilot]

Done in commit 23c0993. Renamed Client to ClientInnerChannelState and ServiceRef to ServiceReferenceState in all 38 debug statements in InfoShareWcfSoapWithOpenIdConnectConnection.cs.

[ddemeyer]

You can remove this bullet from the README.MD file as well.

[Copilot]

Done in commit 23c0993. Removed the ISHDeploy bullet point from README.MD line 68.

[ddemeyer]

Rename WriteDebug Client to ClientInnerChannelState. This across all similar debug lines in this file.

[Copilot]

Done in commit 23c0993. Renamed Client to ClientInnerChannelState in all 38 debug statements in InfoShareWcfSoapWithWsTrustConnection.cs.

[ddemeyer]

@copilot can you make the requested changes?

Corrected the copilot code after a debug session. Moamen reviewed the code.